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PhysicsNovice
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Hello again Everyone. I am on to conduction, convection, radiation and the stoppage of all molecular motion. Very complicated information for me. I have completed my next on-line module and about to take my self-assessment quiz. Please review my answers (marked with an asterisk) and let me know what you think. Remember, I will provide commentary when asked so let me know which ones are correct. For those that are wrong you can provide some guidance. Not necessarily the correct answer. Thanks and Holidays to everyone.
1. How many calories are required to heat 600 g of water from 23° C to 33° C?
a. 60
b. 600
c. 6000*
d. 13800
2. What effect would there be on Joule's experiment if the mass fell rapidly, hit the floor with substantial speed, and this was ignored?
a. Nothing. The loss in gravitational potential energy would still be the same.
b. Nothing. The kinetic energy is converted to heat when the mass hits the floor.*
c. The number of joules equivalent to 1 calorie would be larger.
d. The number of joules equivalent to 1 calorie would be smaller.
3. A typical jogger burns up food energy at the rate of about 40 kJ per minute. How long would it take to run off a piece of cake if it contains 400 Calories (about 1,700 kJ)?
a. 1 min.
b. 4.25 min.*
c. 10 min.
d. 42.5 min.
4. Which of the following statements does NOT correctly describe what happens when a hot block is placed in contact with a cool block?
a. Heat flows from the hot block to the cool block.
b. The average kinetic energy of the particles decreases in the hot block and increases in the cool block.
c. The temperature of the hot block decreases and that of the cool block increases.
d. Temperature flows from the hot block to the cool block.*
5. The first law of thermodynamics is a re-statement of the law of conservation of:
a. Angular momentum
b. Linerar momentum
c. Mechanical energy
d. Energy*
6. The third law of thermodynamics:
a. Is a restatement of the law of conservation of energy*
b. Says that heat cannot be completely converted to mechanical energy
c. Says that we can never reach the absolute zero temperature.
d. Says that all motion ceases at absolute zero.
7. The boiling point of liquid nitrogen at atmospheric pressure is 77 K. Which of the following temperatures is the closest to the temperature of an open container of liquid nitrogen?
a. 76 K
b. 77 K*
c. 78 K
d. 293 K
8. Which of the following is NOT a method of transporting thermal energy from one place to another?
a. Radiation
b. Condensation*
c. Conduction
d. Convection
9. In conduction, thermal energy is transported by:
a. The movement of a fluid.
b. The collision of particles.*
c. Electromagnetic fields.
d. The propagation of sound waves.
10. In radiation, thermal energy is transported by:
a. The movement of a fluid
b. the collision of particles.
c. Electromagnetic fields.*
d. The propagation of sound waves.
1. How many calories are required to heat 600 g of water from 23° C to 33° C?
a. 60
b. 600
c. 6000*
d. 13800
2. What effect would there be on Joule's experiment if the mass fell rapidly, hit the floor with substantial speed, and this was ignored?
a. Nothing. The loss in gravitational potential energy would still be the same.
b. Nothing. The kinetic energy is converted to heat when the mass hits the floor.*
c. The number of joules equivalent to 1 calorie would be larger.
d. The number of joules equivalent to 1 calorie would be smaller.
3. A typical jogger burns up food energy at the rate of about 40 kJ per minute. How long would it take to run off a piece of cake if it contains 400 Calories (about 1,700 kJ)?
a. 1 min.
b. 4.25 min.*
c. 10 min.
d. 42.5 min.
4. Which of the following statements does NOT correctly describe what happens when a hot block is placed in contact with a cool block?
a. Heat flows from the hot block to the cool block.
b. The average kinetic energy of the particles decreases in the hot block and increases in the cool block.
c. The temperature of the hot block decreases and that of the cool block increases.
d. Temperature flows from the hot block to the cool block.*
5. The first law of thermodynamics is a re-statement of the law of conservation of:
a. Angular momentum
b. Linerar momentum
c. Mechanical energy
d. Energy*
6. The third law of thermodynamics:
a. Is a restatement of the law of conservation of energy*
b. Says that heat cannot be completely converted to mechanical energy
c. Says that we can never reach the absolute zero temperature.
d. Says that all motion ceases at absolute zero.
7. The boiling point of liquid nitrogen at atmospheric pressure is 77 K. Which of the following temperatures is the closest to the temperature of an open container of liquid nitrogen?
a. 76 K
b. 77 K*
c. 78 K
d. 293 K
8. Which of the following is NOT a method of transporting thermal energy from one place to another?
a. Radiation
b. Condensation*
c. Conduction
d. Convection
9. In conduction, thermal energy is transported by:
a. The movement of a fluid.
b. The collision of particles.*
c. Electromagnetic fields.
d. The propagation of sound waves.
10. In radiation, thermal energy is transported by:
a. The movement of a fluid
b. the collision of particles.
c. Electromagnetic fields.*
d. The propagation of sound waves.
