Substantial heat transfer by conduction can occur over great distances
What will be an ideal response?
The veracity of the answer depends on the student's interpretation of "great
distance." A student might cite, for example, conduction from Earth's core to Earth's
surface, which takes place over thousands of kilometers. However, this is not the common
experience; more likely is for the student to think about conduction from soup to fingers
through a metal spoon. In the latter case, we will excuse the student from thinking that
conduction is a short-distance phenomenon. I would grade the student on the reasoning
exhibited rather than the answer.
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The mass number of an atom is equal to the number of what particles in the nucleus?
A) protons B) neutrons C) nucleons D) electrons E) positrons.
The average molecular kinetic energy of a gas can be determined by knowing only
A) the number of molecules in the gas. B) the volume of the gas. C) the pressure of the gas. D) the temperature of the gas. E) all of the above must be known.
Potential: After a proton with an initial speed of 1.50 × 105 m/s has increased its speed by accelerating through a potential difference of 0.100 kV, what is its final speed? (e = 1.60 × 10-19 C , mproton = 1.67 × 10-27 kg)
A. 4.56 × 105 m/s B. 2.04 × 105 m/s C. 3.55 × 105 m/s D. 8.80 × 105 m/s E. 1.55 × 106 m/s
The change in entropy of 1.00 kg of water that is heated from 50°C to 100°C is (in cal/K)
a. 516 b. 312 c. 144 d. 946 e. 391