472. Q. & A.s ‑‑‑ SCI. & TECH. – 26

Q. &  A.s  ‑‑‑  SCI.  &   TECH. – 26

701Q. What are the causes of numbness?

Causes

There are many possible causes of numbness and tingling:

• Sitting or standing in the same position for a long time
• Injuring a nerve (a neck injury may cause you to feel numbness anywhere along your arm or hand, while a low back injury can cause numbness or tingling down the back of your leg)
• Pressure on the nerves of the spine, such as from a herniated disk
• Pressure on peripheral nerves from enlarged blood vessels, tumors, scar tissue, or infection
• Shingles or herpes zoster infection
• Lack of blood supply to an area (for example, from atherosclerosis or frostbite)
• Other medical conditions, including:

o    Carpal tunnel syndrome (pressure on a nerve at the wrist)

o    Diabetes

o    Migraines

o    Multiple sclerosis

o    Seizures

o    Stroke

o    Transient ischemic attack (TIA), sometimes called a "mini-stroke"

o    Underactive thyroid

o    Raynaud's phenomenon

• Abnormal levels of calcium, potassium, or sodium in your body
• A lack of vitamin B12 or other vitamin
• Use of certain medications
• Nerve damage due to lead, alcohol, or tobacco
• Radiation therapy
• Animal bites
• Insect, tick, mite, and spider bites
• Seafood toxins

702Q. Why do we feel pressure when we travel through a tunnel?

1.      Compression and expansion of air waves through the tunnel

2.      Piston effect

3.      Pushing of air effect

4.      Complex pressure structure through the tunnel

5.      Atmospheric pressure

6.      Structure of the tunnel

7.      Pressure fluctuations

8.      Superimposition of different waves through the tunnel.

703Q.   Where are currency notes printed in India? [NB]

1.      Nasik               -           Maharashtra    [currency notes press]

2.      Dewas             -           M.P.                [Bank Note Press]

3.      Mysore            -           Karnataka        [Bharathiya Reserve Bank Pvt. Ltd.,]

4.      Hoshangabad  -           M.P.

5.      Salboni            -           W.B.

704Q.   How is the price fixed on a commodity? [NB]

1.      The cost of raw material obtained      +

2.      Establishment cost                              +

3.      Manufacturing cost                             +

4.      Salaries paid [workers]                        +

5.      Current bill                                          +

6.      Maintenance cost                                +

7.      Tax [to govt.]                                      +

8.      Profit [ to owner]                                +

9.      Transportation                                     =          the price of the commodity

705Q.   How is currency produced? [NB]

Act. 1906.

1.      Minimum gold reserve system

2.      The cost of oil produced in a year

3.      The cost of industrial production  in a year

4.      Growth rate of economy

There is no hard and fast rule for this.

It depends upon the each country.

706Q.   Power [index]  values. [NB]

POSITIVE  VALUES

NEGATIVE  VALUES

101 102 103 106 109 1012 1015 1018 1021 1024

Deca Hecta Kilo Mega Giga Tera Peta Exa Zeta Yotta

10-1 10-2 10-3 10-6 10-9 10-12 10-15 10-18 10-21 10-24

Deci Centi Milli Micro Nano Pico Femto Atto Zepto Yocto

707Q.   Place values.

INDIA  SYSTEM

WESTERN  SYSTEM

UNITS Tens Hundreds Thousands Ten thousands Lakhs Ten lakhs Crores Ten crores Arabs Ten arabs Kharabs Ten kharabs Nils Ten nils Padams Ten padams Shanks Ten shanks

708Q.  What are Big Data technologies?

1] Column-oriented databases

2] Schema-less databases, or NoSQL databases

3] MapReduce

4] Hadoop

5] Hive

6] PIG

7] WibiData

8] PLATFORA

9] Storage Technologies

10] SkyTree

11] Big Data in the cloud

709Q.  How is the volumes of space needed in Bigdata?

Every day 2.5 quintillion (2.5×10¹⁸) bytes of data were created.

Big science Government Private sector International development Technologies Research activities and so on

The Large Hadron Collider experiments represent about 150 million sensors delivering data 40 million times per second. Obama administration composed of 84 different big data programs spread across in six departments. The facility will be able to handle yottabytes of inform Amazon.com handles -      24.7 TB Wal-Mart -                         2.5 petabytes Facebook handles              50 billion photos GPS signals from nearly    100 million drivers telecommunication networks - 667 exabytes annually in 2013.

710Q.  What are the regulatory procedures for introduction of a new bulk drug/formulation in the market?
Launching a new bulk drug is a hugely expensive proposition requiring rigorous scientific research, enormous risks of costly failures and validation trials. Some MNCs say they spend $800m for a new drug invention. An investigational new drug application is being filed before a regulator when a company wants to introduce a new chemical entity — bulk drug — with a presumed therapeutic effect.
On the other hand, the formulator merely requires to prove that his product is bio-equivalent to the existing formulations in the class- that is, the rate and extent of drug absorption don't vary beyond permitted limits from the extant formulation/s of the bulk drug. In the case of established drugs, the formulators are practically exempted from this requirement, while in the case of drugs that so far remained under a patent — which means that only the inventor's formulation/s of the bulk drug existed thus far — bio-equivalence studies are mandatory for marketing permit for at least the first few new formulators. This is what happens when Indian firms closely follow patent expirations to launch their formulations of the patent-expired drug.

711Q.  Can a formulation have more than one bulk drug?

Although most formulations contain only one bulk drug, there are a large number of formulations containing more than one bulk drug. The number of such fixed dose combination (FDC) formulations are increasing. Regulators see a new FDC made by combining two bulk drugs as a "new drug" because unlike inactive ingredients, these active ingredients require to be verified for their safety and efficacy given the chance of clinically adverse interactions.

712Q.  What is a generic drug?

A generic drug is a drug named after the internationally accepted scientific name of the API. For example if a company sells antibiotic bulk drug Ciprofloxacin by that name, it is generic Ciprofloxacin and if a formulation of the drug is sold as Ciprofloxacin in the retail market, it is generic formulation of Ciprofloxacin.

If a company sells the same formulation under its proprietary brand name, then it is a branded drug. Branded names are capitalised while generic names are not. Generally, prices of generic products are expected to be lower than the prices of branded items. Although it may be an exemplary ethical practice for a registered medical practitioner to prescribe the generic name of the drug, it is increasingly becoming a norm to prescribe brands also. But, the term generic drug is also relative and contextual. This is because it is increasingly being used to refer drugs that are off-patent. Branded off-patent drugs too are described as generic drugs in the highly regulated and patent-prevailing markets like the US, whereas in countries like India where there is no product patent on pharmaceuticals, a non-branded medicine is a generic medicine. To distinguish between the two meanings of generics, non-branded drugs are also referred to as "generic generics."

713Q.  How are different electronic devices connected?

There are lots of different ways that electronic devices can connect to one another. For example:

·Component cables

·Electrical wires

·Ethernet cables

·­Wi-Fi

·Infrared signals

·Bluetooth

714Q.  What are non-linear loads and why are they a concern today?

A load is considered non-linear if its impedance changes with the applied voltage. The changing impedance means that the current drawn by the non-linear load will not be sinusoidal even when it is connected to a sinusoidal voltage. These non-sinusoidal currents contain harmonic currents that interact with the impedance of the power distribution system to create voltage distortion that can affect both the distribution system equipment and the loads connected to it.

In the past, non-linear loads were primarily found in heavy industrial applications such as

1.    arc furnaces,

2.    large variable speed drives,

3.    heavy rectifiers for electrolytic refining, etc.

The harmonics they generated were typically localized and often addressed by knowledgeable experts.

715Q.  What are the causes of diabetes?

• sedentary lifestyle
• obesity (weighing 20 percent above a healthy body weight)
• advanced age
• unhealthy diet
• family history of diabetes
• improper functioning of the pancreas
• minority race (higher risk in Black, Hispanic, American Indian, westernized Asian and native Hawaiian populations)
• medication (cortisone and some high blood pressure drugs)
• women having given birth to a baby weighing more than 9 lbs.
• previously diagnosed gestational diabetes
• previously diagnosed IGT

716Q.  What are the visionary companies?

1.      3M, 

2.      American Express, 

3.      Boeing, 

4.      Ford, 

5.      General Electricity, 

6.      HP, 

7.      IBM, 

8.      Johnson & Johnson, 

9.      Motorola, 

10.  PG, 

11.  Sony, 

12.  Wal-Mart., 

13.  Walt Disney,

717Q.  How to test THE BEST OF THE BEST?

STEP 1. What companies should we study?

STEP 2. Avoid the “discover building” trap.

STEP 3. History and evolution

STEP 4. Months, and  years, of coding, analysis, and tortoise hunting.

STEP 5. Harvesting the fruits of our labour.

STEP 6. Field testing and application in the real world.

718Q.  How did they begin?

1.      Sony started with a rice cooker. [failed]

2.      Sony’s second product – a tape recorder – [failed]

3.      Merck started importing chemicals from Germany.

4.      P & G started as a simple soap and candle maker.

5.      Motorola began with battery eliminator repair business.

6.      3M started as a failed corundum mine.

7.      Boeing’s first airplane failed.

719Q. What problems does a management have?

1.      To give good job

2.      Good salary

3.      Create environment

4.      Identity

720Q.   What's the problem with having too much insulin in your circulation?

Excess insulin is known to cause:

·Weight gain, since insulin promotes the storage of fat

·Lower cellular levels of magnesium, a mineral that is essential for keeping your blood vessels relaxed and your blood circulation efficient

·An increase in sodium retention, which leads to holding excess water in your system, which causes high blood pressure

·Increased amounts of inflammatory compounds in your blood, which can cause direct physical damage to your blood vessel walls and encourage the development of blood clots which can lead to heart attacks and respiratory failure

·A reduction in HDL, an increase in undesirable small molecules of LDL, and an increase in triglycerides, all of which increase your risk for heart disease

·Possibly a higher risk for cancer due to insulin's ability to contribute to cell proliferation

721Q.  What can you do with your food and lifestyle choices to support healthy blood sugar and insulin levels?

1.    Make non-starchy vegetables the foundation of your diet. Dark green leafy lettuce, tomatoes, celery, cucumber, cabbage, kale, Swiss chard, bok choy, zucchini, broccoli, cauliflower, and all unmentioned green vegetables are excellent choices.

2.    Reduce or eliminate your intake of sugar and all foods that contain sugar. Some of the most concentrated sources of sugar are soda, cookies, chocolate bars, donuts, pastries, ice cream, and ketchup.

3.    Reduce or eliminate your use of sweeteners like molasses, corn syrup, high fructose corn syrup, pasteurized/heated honey, and maple syrup.

4.    Limit intake of fruit juices. Even freshly squeezed fruit juice taken over the long term can lead to high blood sugar and insulin levels. If you want to taste fruit, eat whole fruit, not the juice. The fiber, vitamins, and minerals that come with whole fruit help to slow down the pace at which the natural sugars from fruit enter your bloodstream.

5.    Do activities and exercises that build or maintain your muscles. Muscle tissue acts as a storage site for extra sugar. The more muscle tissue you have, the better you can regulate your blood sugar and insulin levels.

722Q.  Why is aging called disease?

        We know now that aging is a disease.
The other case studies are

1.    cardiovascular disease,

2.    osteoporosis,

3.    obesity,

4.    diabetes,

5.    cancer,

all the so-called chronic diseases of aging and auto-immune diseases, those are symptoms.

723Q.   What's the problem with having too much insulin in your circulation?

Excess insulin is known to cause:

·Weight gain, since insulin promotes the storage of fat

·Lower cellular levels of magnesium, a mineral that is essential for keeping your blood vessels relaxed and your blood circulation efficient

·An increase in sodium retention, which leads to holding excess water in your system, which causes high blood pressure

·Increased amounts of inflammatory compounds in your blood, which can cause direct physical damage to your blood vessel walls and encourage the development of blood clots which can lead to heart attacks and respiratory failure

·A reduction in HDL, an increase in undesirable small molecules of LDL, and an increase in triglycerides, all of which increase your risk for heart disease

·Possibly a higher risk for cancer due to insulin's ability to contribute to cell proliferation

724Q.  What can you do with your food and lifestyle choices to support healthy blood sugar and insulin levels?

1.    Make non-starchy vegetables the foundation of your diet.

Dark green leafy lettuce, tomatoes, celery, cucumber, cabbage, kale, Swiss chard, bok choy, zucchini, broccoli, cauliflower, and all unmentioned green vegetables are excellent choices.

2.    Reduce or eliminate your intake of sugar and all foods that contain sugar.

Some of the most concentrated sources of sugar are

soda,

            cookies,

                        chocolate bars,

                                    donuts,

                                                pastries,

                                                            ice cream,     and

                                                                        ketchup.

3.    Reduce or eliminate your use of sweeteners like molasses, corn syrup, high fructose corn syrup, pasteurized/heated honey, and maple syrup.

4.    Limit intake of fruit juices.

Even freshly squeezed fruit juice taken over the long term can lead to high blood sugar and insulin levels.

If you want to taste fruit, eat whole fruit, not the juice.

The fiber, vitamins, and minerals that come with whole fruit help to slow down the pace at which the natural sugars from fruit enter your bloodstream.

5.    Do activities and exercises that build or maintain your muscles.

Muscle tissue acts as a storage site for extra sugar.

The more muscle tissue you have, the better you can regulate your blood sugar and insulin levels.

725Q.  What are the superconducting Materials?

A large number of elements and compounds have semiconducting properties, including:

·Certain pure elements found in Group IV of the periodic table; the most commercially important of these elements are silicon and germanium.

·Binary compounds, particularly between elements in Groups III and V, such as gallium arsenide, Groups II and VI, groups IV and VI, and between different group IV elements, e.g. silicon carbide.

·Certain ternary compounds, oxides and alloys.

·A number of organic compounds.

471. Q. & A.s ‑‑‑ SCI. & TECH.

Q. &  A.s  ‑‑‑  SCI.  &  TECH. –

Q: To save on cooling costs, is it recommended to shut the air-conditioner vents in rooms that are unused and closed?

A: If designed correctly, the air delivery system in your house has been sized according to the flow requirements of the unit and each room. Closing off vents can create a pressure imbalance within the system that can reduce the effectiveness of your cooling system. By closing off registers, the increased pressure within the ducts can also cause increased duct leakage.

Q: Can I allow the upstairs to heat up even more during the day and cool the downstairs less at night?

A: Anytime you increase the temperature on your thermostat, you save money. When a unit first turns on, it takes seven to 10 minutes of continuous operation to reach maximum efficiency. The longer it runs after reaching peak efficiency, the better it is for the unit. When you return home at night and the unit is forced to run longer to bring the temperature down, it is running at peak efficiency. If you are on the SRP Time-of-Use™ Price Plan, and run your unit during the off-peak period, you'll be taking advantage of lower-priced electricity.

Q: Is it more energy efficient for the air conditioner to come on for short bursts of cooling (running for five to seven minutes at a time) or to come on and stay on for longer periods? How about the wear and tear on the unit as well?

A: A heat pump's job is two-fold. Not only does it remove the heat from your home, it also must remove the moisture from the inside air in order for you to feel comfortable. When the unit first turns on, it will take about seven to 10 minutes for the unit to get to its peak efficiency and remove the moisture from your home. By allowing a unit to run five to seven minutes, you're not getting the most out of the system. The starting and stopping is also hard on the system.

Q: Should I leave interior doors open or closed during heating and cooling?

A: Because the air-conditioning systems in our homes are closed-loop system, they are designed to move a specific amount of air throughout the house. Closing bedroom doors causes the air pressure in those rooms to increase. The air-conditioning unit pushes air in but cannot get it back out, which causes the unit to force conditioned air out of the bedroom under the door and through cracks or leak around the windows, wall plates and ceiling fixtures and draw in hot attic or outside air through similar cracks and leaks in the rest of the house.

 

Q: We are new to Arizona and are wondering how to configure our air conditioning for summer. We have two units, one upstairs and one down. How do you recommend we set them up for comfort and energy savings? Should they be set on different temperatures? Do we redo the settings at night? What temperatures do you recommend?

A: Because heat rises and extra heat gain exists on the second floor because of the windows and attic, the upper level will require more cooling than the lower level. To maintain a constant temperature in your home, set each thermostat at the same temperature. However, to reduce energy costs, you can maintain a comfortable temperature on the floor you are occupying. If you're not using the upstairs, set the second-floor thermostat a couple of degrees higher. Reverse the process at night when you're upstairs.

Q: Is it better to set the thermostat to a high temperature (85° to 90°) while at work all day and cool the house (two-story, approximately 3,200 square feet) when you get home to a comfortable temperature (approximately 80°), or to keep the thermostat just a degree or two higher during the day so that the cooling unit doesn't have to work as hard during peak hours to cool the house?

A: You will save money anytime you can increase the temperature on your thermostat and cause the unit not to run. The old myth that says you will spend more energy bringing the temperature back down than you would have spent just leaving the thermostat alone is just that, a myth.

Q: Does setting the fan switch on my thermostat to the "on" position cause air imbalances in my home?

A: Assuming there are no interior doors closed in the home, there should be no air imbalance caused by running the air-handler fan. However, in typical Phoenix construction, with a central air-conditioner return, you can get significant pressure imbalances when interior doors are closed. Because the door undercuts are not large enough to allow for sufficient free flow of air, it is common to create imbalances.

Q: If all things are equal, is it better to set your thermostat at a certain temperature all the time or use a programmable thermostat in conjunction with the Time-of-Use Price Plan?

A: Using a programmable thermostat to control the operation of your air conditioner will provide you the greatest savings on the Time-of-Use Price Plan. Not only will scheduled operating schemes reduce the unit's operating time during on-peak periods, but they also will increase the run time of the unit during off-peak periods, and this increased run time will allow the air-conditioning unit to run more efficiently.

Q: I want to replace our thermostat with a programmable one. Which do you recommend?

A: Rather than selecting a certain brand, make sure you select the right programmable thermostat for your system. There are different models for single-stage heat pumps, multistage heat pumps, straight air conditioning, air conditioning with gas heat, etc. Ask your service contractor what type of system you have and what model thermostat you need. After you know what model to get, determine your programming requirements:

• 5-2 programming maintains two temperature schedules — one for weekdays and one for weekends.
• 5-1-1 programming provides the added flexibility of setting different programs for Saturday and Sunday.
• Seven-day programming lets you have different settings for every day of the week.

Q: I am buying a new air conditioner and have the option of purchasing a system that uses R-22 or a system that uses R-410A refrigerant. Will R-22 refrigerant be available in the future?

A: Even though R-22 will not be manufactured after 2010, the supply will last well beyond the life of a new system installed today. The efficiency of the two products is similar. However, R-22 tends to be more stable. R-410A is a mixture of refrigerants that has to have the proper amount of each to be efficient. Any leaks in the system could cause an imbalance and reduce the efficiency of the refrigerant.

Q: What size air conditioner should I install on my 2,000-square-foot house?

A: It is important that new or replacement equipment not be sized by "rule of thumb" or by the existing equipment. The only accurate way to determine the correct capacity of heating and air-conditioning equipment for your home is to have a heat-load calculation performed on your home. This will give your dealer the heat gain and heat loss design data for your home. These figures can then be used to select the appropriately sized cooling or heating system for your home based on equipment performance data: The SRP Certified Contractor Program connects SRP customers with heating and cooling contractors that are able to perform Manual J calculations, which will determine the correct sizing for a new air conditioner or heat pump.

Q: Could you please let me know what SRP recommends on how many tons of air conditioning you should have per square footage of home?

A: It is important to make sure your new unit is properly sized. The best way to determine the proper size is to request an evaluation by an SRP Certified Contractor. SRP Certified Contractors perform Manual J or equivalent load calculations on installations of replacement and new heat pumps. A Manual J calculation determines the size of the air-conditioning unit required for your home.

Q: We have a heat pump that was installed in 1998. When installed, the thermostat was set to take into account a 1° temperature difference (more frequent cycling on/off of unit). We've recently been trying a 2° temperature difference (less frequent cycling on/off). Which is best for the most efficient operation of our heat pump?

A: When a unit first turns on, it typically takes about seven to 10 minutes of continuous operation before it reaches the steady state and highest efficiency. The longer the unit runs after it reaches its steady state, the longer the unit will be operating at its peak efficiency. Anytime you can reduce the number of cycles and increase the run time, you will save money and increase the comfort level of your home.

Q: Does the design of new residential heat pumps cause lights to flicker in the house?

A: New high-efficient heat pumps often cause lights in homes to flicker. The motors used in high-efficiency heat pumps draw more in-rush current (amps) when they first start (compared with older, less efficient units). This will cause the voltage to drop at your service panel for a fraction of a second. This can sometimes be observed as flicker (dimming of the lights).

Q: With the commercialization of variable-speed heat pumps, have the benefits of a programmable thermostat been reduced or eliminated? It seems to me that with variable-speed equipment, the correct operating strategy would be to set the thermostat at one setting and let the unit choose its own speed instead of using a "set up, set down" strategy that could cause the unit to run at high speed more of the time.

A: You would get better humidity control by setting the thermostat and leaving it. However, if the contractor oversizes the unit, there may still be a reason to set the temperature higher while you are away. Correct system sizing still has to be the No. 1 issue, and then nearly everything else will fall into place.

Q: Do high-efficiency filters harm my air-conditioning system?

A: The use of high-efficiency filters won't necessarily harm your air conditioner; however, they can cause the unit to pull hot attic air into the ductwork, reducing the overall efficiency of the system. By adding a high-efficiency filter to your system, you add resistance to the air moving across the filter. Because the fan in your system is rated to move a certain amount of air, it will get this air from anywhere it can. If the added resistance of the filter makes it easier to draw air into the ducts through leaks in the ductwork, then it will do so.

Aside from the added resistance of a high-efficiency filter, this scenario is exactly why it is so important to replace your filters on a regular basis. As the filter becomes dirty, the resistance increases and the unit begins to pull more and more air in through the leaks in the ductwork. If your ducts are tight and in good shape, the use of a high-efficiency filter is fine. However, to avoid possible airflow problems, I recommend the 3/4-inch to 1-inch pleated filter that usually costs $4 to $6.

Q: I have never changed my filters. Every time I check them, they look like the day I bought them. Is that good? My house is 2,400 square feet, and my electric bill is subnormal.

A: Never having to change your filters is unusual, especially with Arizona's fine dust. If you are using very inexpensive filters, they may be too loose to catch any of the fine dust. This allows the dust to accumulate on the unit's evaporator coil, which could cause problems down the road. I recommend trying the 1-inch pleated filter (typically $4 to $6). More expensive filters may be too restrictive and could cause problems for your air conditioning unit.

Q: How do I balance the air being supplied to each room of my house?

A: The only accurate way of determining how to set your supply registers is to have a contractor complete a load calculation on your house. As part of this process, the calculation software will identify how much air should be delivered to each room. Once this is known, the contractor will measure and adjust the amount of air being delivered at each register. The "do-it-yourself" approach is to experiment with different settings over the course of a couple weeks until you get an even comfort level throughout the house.

Q: Are there advantages to shading your outside air-conditioning unit if you provide for proper air circulation?

A: Shading the coils of an air-conditioning unit has the potential to modestly reduce energy demand. However, improper shading techniques can result in a net increase in energy consumption by blocking proper airflow or trapping radiant heat. In many cases, a simpler approach is to plant trees strategically around a building to reduce indoor cooling loads or pursue other, more surefire air-conditioning efficiency upgrades.

Q: My landscapers built a three-sided wall around my ground air-conditioning unit in the backyard, and I am concerned that there may be restricted airflow to the unit. The wall is made of concrete block covered with stucco and painted on the outside. It is as tall as the unit and surrounds it on three sides. There is a break of about 24 inches on one side, and the wall is built about eight to 12 inches from the unit itself. How will this affect the life of the unit, cost to run, etc.? What options do you suggest to vent the wall ,or should I totally remove it?

A: The outdoor unit must be positioned a minimum of 12 inches from any wall or surrounding shrubbery to ensure adequate airflow. A 30-inch clearance must be provided in front of the control box (access panels) and any other side requiring service access to meet National Electrical Code. The top discharge area must be unrestricted for at least 5 feet above the unit.

Total 20

470. Q U I Z No. 24

Q U I Z  No.  24

1.      Graphene pays way for better digital storage.

2.      A dozen different compounds give strawberry aroma.

3.      Global warming contributes to spread of west Nile Virus.

4.      Extensive glacial retreat in Mount Everest region.

5.      Fish oil doen’t help macular degeneration in the aged.

6.      Healthy lifestyle offsets work-related stress.

7.      Human activity7 caused extreme algal bloom.

8.      Soil in newly forested areas store more carbon.

9.      Complex m osquito gene stymies malaria control.

10.  LEDs disrupt sleep.

11.  Gold nanoparticles for drug deliver is used.

12.  Earth’s iron core is only 40% as strong as believed.

13.  Air and noise pollution increase cardiovascular risk.

14.  Icebergs float on water because they are lighter than water.

15.  Water in liquid form is 1  gm/cc whereas in solid state it is 0.92 gms/cc.

16.  George Gamov is a greatest scientist, and Assimov is a great science writer.

17.  Ladak is the place where it never rained.

18.  High frequencies in power transmission cannot be economically transmitted to long distances.

19.  Japan's utility frequencies are 50 Hz and 60 Hz

20.  DC could not be easily changed in voltage, and was generally only produced at the required utilization voltage.

21.  Certain parts of the digestive system are altered so that they secrete enough insulin needed to the body.

22.  The testosterone which issecreted in female body is the cause of hair fall.

23.  Tricologist is the doctor for hair.

24.  Mammoth lived 25 lakh years to 30 thousand years back having a height of 14 feet.

25.  The formula for length contraction is

where

       is the proper length (the length of the object in its rest frame),

         is the length observed by an observer in relative motion with respect to the oject,

          is the relative velocity between the observer and the moving object,

          is the speed of light,

and the Lorentz factor is defined as

.

26.  disruptions occurring from coincidental inventions, changes in regulations and society, exploding demand for new products as well as growth in complementary technologies created through strange connections.

27.  The Nintendo Wii system is well-matched with Gamecube games as well as the Gamecube controller even though the two systems use very different controllers. The Wii also has the capability to download games from the original Nintendo (NES), Super Nintendo (SNES), and the Nintendo 64.

28.  A neutrino is an electrically neutral, weakly interacting elementary subatomic particle with half-integer spin.