Two bodies can be in thermal equilibrium with one another when they are at the same temperature even if they
a. absorb different quantities of thermal energy from their surroundings in equal time intervals.
b. have different masses.
c. have different volumes.
d. have any of the properties listed above. e. have any of the properties listed above and one of them is contact with a third body at a different temperature.
D
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At room temperature (20.°C) the area of a hole in a sheet of material is 5.505 cm2. When heated to 830.°C the area increases by 29.0 mm2
(a) What is the thermal coefficient of linear expansion for the material? (b) If the temperature had decreased to -76.° Fahrenheit, what would be the area of the hole?
Monochromatic light is incident on a metal surface and electrons are ejected. If the intensity of the light is increased, what will happen to the ejection rate and maximum energy of the electrons?
A) Greater rate; same maximum energy. B) Same rate; greater maximum energy. C) Greater rate; greater maximum energy. D) Same rate; same maximum energy.
Escape Speed: Planet W-70 has a radius of 2.48 × 107 m and an escape velocity of 23,300 m/s. What is the mass of W-70? (G = 6.67 × 10-11 N ? m2/kg2)
A. 1.01 × 1026 kg B. 2.02 × 1026 kg C. 3.03 × 1026 kg D. 4.04 × 1026 kg E. 5.05 × 1026 kg
Thin Films: Light has a wavelength of 600 nm in a vacuum. It passes into glass, which has an index of refraction of 1.50. What is the wavelength of the light in the glass?
A. 600 nm B. 500 nm C. 400 nm D. 300 nm E. 900 nm