What is conserved when a photon collides with an electron?
A) momentum
B) energy
C) both of these
D) neither of these
Answer: C
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What value should you use as the area of the base when calculating the answer to Part C?
In Part C, you are asked to calculate the volume of a rectangular prism that has a length of 5.6 cm, a width of 2.1 cm, and a height of 6.6 cm.
A. 12 cm2
B. 11.8 cm2
C. 11.76 cm2
What is the purpose of the negative sign in Fourier’s law of conduction heat transfer?
What will be an ideal response?
One kilogram of chilled water at 32°F (0°C) is placed in a freezer which is kept at 0°F (?18°C). Approximately how much electric energy (in kilocalories) is needed to operate the compressor to cool this water to 0°F if the room temperature is maintained at 75°F (24°C)? (Lice = 3.33 × 10^5 J/kg; cice = 2.09 × 10^3 J/kg/°C)
a. 13 b. 1.5 c. 15 d. 16 e. 33
Which fact about comets is FALSE?
A. Comets are a complex mix of ice and dust. B. Comets' tails disappear when they are closest to the Sun. C. Short period comets have orbital periods less than 200 years and have predictable orbits. D. In ancient history, the appearance of a comet was regarded as a sign that unpleasant events would occur. E. The dust tail of a comet is white, diffuse, and curved.