324. Q U I Z NO. 12

Q U I Z   NO. 12

Hindu

1. True or false? The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit).  True

2. When water is cooled, does it expand or contract?  Expand

3. True or false? The highest temperature ever recorded on Earth is 42.4 °C (108.3 °F).   False - 57.8 °C (136 °F)

4. Heat from the sun gets to the Earth by radiation, conduction or convention?  Radiation

5. What is the freezing temperature of water? 0 degrees Celsius (32 degrees Fahrenheit)

6. True or false? Kelvin, Celsius and Fahrenheit are all measures of temperature.  True

7. True or false? 100 Kelvin is the temperature of absolute zero.  False - 0 Kelvin

8. Substances that don’t conduct heat are known as what?  Insulators

9. True or false? Heat is a form of energy.  True

10. At what temperature is Fahrenheit equal to Centigrade?  -40 degrees

11.  On march 13, the world’s most powerful telescope, located in the Atacama Desert.

12.  E. Coli exhibited enhanced growth rate and that several genes were differentially expressed.

13.  E. Coli growth is more in microgravity than in normal gravity.

14.  Viruses need to enter cells and hijack their molecular machinery in order to  replicate and spread.

15. The term is normally used for the region of the electromagnetic spectrum between 300 gigahertz and 3 terahertz

16. terahertz radiation corresponding to the sub millimeter wavelength.

17.  THz waves usually travel in line of sight.
18. Spectroscopy in terahertz radiation could provide novel information in chemistry and biochemistry

19.  Particle and antiparticle;  electron/positron, proton/antiproton, neutron/antineutron.

20.  Particle-antiparticle pairs can annihilate each other, producing photons
21.  Antiparticles are produced naturally in beta decay, and in the interaction of cosmic rays in the Earth's atmosphere.

22.  In 1932 positrons by Paul Dirac, Carl D. Anderson found that cosmic-ray collisions produced these particles in a cloud chamber

23.  The antiproton and antineutron were found by Emilio Segrè and Owen Chamberlain in 1955 at the University of California, Berkeley.

24.  The antiparticle theory is also called hole theory.

25.  In other words, particle and antiparticle must have

• the same mass m
• the same spin state J
• opposite electric charges q and -q.