A charged particle is moving in a magnetic field. What is the direction of the force on the particle due to the magnetic field?
a) in the direction of the magnetic field
b) in the direction opposite to which the particle is moving
c) in the direction that is perpendicular to both the magnetic field and the velocity
d) in the same plane as the magnetic field and the velocity, but not in either of those two directions
e) in the direction of motion
Ans: c) in the direction that is perpendicular to both the magnetic field and the velocity
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In which process will the internal energy of the system NOT change?
a. An adiabatic expansion of an ideal gas. b. An isothermal compression of an ideal gas. c. An isobaric expansion of an ideal gas. d. The freezing of a quantity of liquid at its melting point. e. The evaporation of a quantity of a liquid at its boiling point.
Earth's magnetic axis is the same as its rotation axis.
Answer the following statement true (T) or false (F)
An object is 12 cm in front of a concave spherical mirror, and the image is 3.0 cm in front of the mirror. What is the focal length of the mirror?
A) 0.25 cm B) 15 cm C) 4.0 cm D) 2.4 cm E) 1.3 cm