What is the definition of heat capacity?
a. The amount of heat that raises one gram of water one degree Celsius.
b. The amount of heat that raises the temperature of an object one degree Celsius.
c. The amount of heat an object can stand before it burns up.
d. The maximum amount of heat an object can hold.
e. The amount of heat an object can pass to a cooler object.
b
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Hydrogen emits light at certain discrete frequencies. One particular emission has a frequency of 4.57 × 1015 s-1, as measured in the frame of reference of the hydrogen atom
Light from this emission is observed coming from a star that is moving away from Earth at 0.900c. What is the observed frequency? Note that, in addition to time dilation, one must take into account that successive wavefronts have to travel longer distances because the star is moving away (Doppler Effect). A) 1.99 × 1015 s-1 B) 7.62 × 1015 s-1 C) 1.99 × 1016 s-1 D) 1.05 × 1015 s-1 E) 0.90 × 1015 s-1
The term "timbre" refers to which of the following?
a. Any musical instrument made primarily of wood. b. The quality of sound from instruments due to the mixture of harmonics. c. Instruments that have valves. d. An instrument made in France.
An airplane moves 140 m/s as it travels around a vertical circular loop which has a 1.0-km radius. What is the magnitude of the resultant force on the 70-kg pilot of this plane at the bottom of this loop?
a. 2.1 kN b. 1.4 kN c. 0.69 kN d. 1.5 kN e. 1.3 kN
The Saturnian moons of most interest to exobiologists are
A) Rhea and Iapetus. B) Phoebe and Dione. C) Mimas and Tethys. D) Hyperion and Miranda. E) Titan and Enceladus.