If the rms value of the electric field is 9.0 V/m at a distance of 6.0 m from an isotropic source, what is the rms value of the magnetic field at a distance of 12 m from the source?
a. 
b. 
c. 
d. 
e. 
b.
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Which of the following is NOT a unit of pressure?
A) Pascal B) inches of mercury C) psi D) atmosphere E) N-
When an acrobat hangs motionless from a pair of rings
a. she has no measurable weight. b. her weight depends on the angles the ropes make with the ceiling. c. her weight is reduced by the upward force the rings exert on her. d. her weight is increased by the upward force the rings exert on her. e. she exerts a gravitational force on the Earth that is equal to the sum of the forces the rings exert on her.
Matter composed in such a way that all samples of
it have a fixed composition and identical properties is classified as a) a pure substance. b) a mixture. c) an allotrope. d) a saturated solution.
If a quantity you calculated had units of kg ? m/s, what type of quantity could it be? (There could be more than one correct choice.)
A) momentum B) kinetic energy C) work D) impulse E) force