When a solid melts,
A) the temperature of the substance increases.
B) the temperature of the substance decreases.
C) heat energy leaves the substance.
D) heat energy enters the substance.
Answer: D
You might also like to view...
Compton Scattering: A 140-keV photon strikes an electron and scatters through an angle of 120° from its original direction. (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)(a) What is the wavelength of the photon before scattering?(b) What is the photon wavelength after scattering?
What will be an ideal response?
If an object of mass 20 kg on earth is sent to the moon it will have a mass of
A. 10 kg. B. 20 kg. C. 0.0 kg. D. 4.0 kg.
The diagram illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see an absorption spectrum?
a. 1
b. 2
c. 3
d. 2 and 3
e. none of them
A ring and a disk both at rest roll down a hill together. Which rolls slower?
A) ring B) disk C) depends on the masses D) both roll at the same speed E) need more information