Two isotopes of uranium have the same
a. mass number
b. neutron number
c. atomic number
d. nucleon number
e. nucleon number and neutron number
C
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During an adiabatic process, an ideal gas does 25 J of work. What is the change in the internal (thermal) energy of the gas during this process?
A) 0.00 J B) 50 J C) 25 J D) -25 J E) -50 J
A ball gains speed while rolling down a hill due mainly to
A) its rotational inertia. B) its angular acceleration. C) a balanced torque. D) an unbalanced torque.
When evaporation at the ocean surface exceeds precipitation, the salinity of seawater
A) increases. B) decreases. C) stays the same.
The look-back time is
a. the time it takes for the light from an object to reach Earth. b. numerically equal to the distance in light-years. c. smaller for more distant objects. d. All of the other choices are correct. e. the time it takes for the light from an object to reach Earth and numerically equal to the distance in light-years.