A 500-eV electron and a 300-eV electron trapped in a uniform magnetic field move in circular paths in a plane perpendicular to the magnetic field. What is the ratio of the radii of their orbits?
a. 2.8
b. 1.7
c. 1.3
d. 4.0
e. 1.0
C
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A single conservative force Fx = (6.0x - 12) N (x is in m) acts on a particle moving along the x axis. The potential energy associated with this force is assigned a value of +20 J at x = 0 . What is the potential energy at x = 3.0 m?
a. +11 J b. +29 J c. +9.0 J d. -9.0 J e. +20 J
By what method of heat transfer does a microwave oven transfer heat to the food being cooked?
What will be an ideal response?
A hydrogen atom that emits an alpha particle is a routine occurrence in
A) the environment. B) laboratories. C) unlikely. D) impossible.
During which type of process applied to an ideal gas is there no change in internal energy of the gas?
A) isobaric B) isothermal C) isochoric D) adiabatic E) Internal energy changes during any of these processes.