Reference no: EM13954159
1. Which of the followings is the coldest?
(a) 0°C ice,
(b) 0°C water,
(c) 0°C water vapor,
(d) 0°C iron,
(e) 0°C PVC pipe
2. What is the heat capacitance of water?
(a) 0.1 ,
(b) 1,
(c) 10,
(d) 100,
(e) 1000 cal/g/°C
3. What is the most convenient form of energy for daily life?
(a) mechanica
l (b) electrical
(c) thermal
(d) chemical
(e) solar.
4. As the surface temperature of the object increases, the wavelength of the radiated light at the maximum intensity will
(a) increase
(b) decrease
(c) remain the same
(d) hard to say
(e) be stronger
5. If the absolute temperature of gas doubles, what happens to the average velocity of the gas atoms (or molecular)?
(a) remains the same
(b) double
(c) quadruples
(d) 41% increases
(e) drops to zero.
6. In a thermoionic emission, if the absolute temperature of the metal surface doubles, what happens to the emitted current density?
(a) remains the same
(b) doubles
(c) quadruples
(d) more than quadruples
(e) reduces.
7. In a black body radiation, if the absolute temperature of the metal surface doubles, what happens to the total emitted power?
(a) remains the same
(b) doubles
(c) quadruples
(d) 8 times higher
(e) 16 times higher.
8. What is the major energy source in USA, 2008? (a) gas (b) oil (c) coal (d) nuclear (e) renewable
9. Which fundamental particle was predicted by Yukawa using Principle of Uncertainty?
(a) proton
(b) meson
(c) lepton
(d) baryon
(e) hyperon
10. Which one has the highest thermal conductivity?
(a) gold
(b) silver
(c) aluminum
(d) copper
(e) diamond
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