Any change of the energy of a system occurs because of
a. energy transfer across the boundaries of the system.
b. combustion of fuels within the system.
c. radioactive decay of elements within the system.
d. all of the above. e. only (b) and (c) above.
A
You might also like to view...
The Devonian is a(n)
a. epoch. b. era. c. eon. d. period.
A point on the rim of a 0.15-m-radius rotating disk has a centripetal acceleration of 5.0 m/s2 . What is the angular speed of a point 0.075 m from the center of the disk?
a. 0.89 rad/s b. 1.6 rad/s c. 3.2 rad/s d. 5.8 rad/s
The number of moons in orbit around Mars is
A) zero. B) one. C) two. D) three.
Two 0.95-kg masses, one aluminum and one tin, both at 80.0°C, are placed in 1.00 kg of water at 20.0°C. What is the equilibrium temperature of the system? The specific heats of aluminum and tin are 900 J/kg/°C and 227 J/kg/°C, respectively
a. 32.2 °C b. 27.1 °C c. 13.2 °C d. 40.3 °C