The c in E = mc2 stands for ______________
Fill in the blank(s) with correct word
the speed of light
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A skier leaves a ski jump with a horizontal velocity of 29.4 m/s. The instant before she lands three seconds later, the magnitudes of the horizontal and vertical components of her velocity are:
a. 0; 29.4 m/s. b. 29.4 m/s; 0. c. 29.4 m/s; 29.4 m/s. d. 29.4 m/s; 41.6 m/s. e. 41.6 m/s; 41.6 m/s.
The electric potential at the surface of a charged conductor
a. is always zero. b. is always independent of the magnitude of the charge on the surface. c. may be set equal to zero by adding an appropriate constant to the potential at all points of space. d. is always such that the potential is zero at all points inside the conductor. e. is always such that the potential is always zero within a hollow space inside the conductor.
Compound Microscope: In a compound microscope
A. both the objective and the eyepiece form real images. B. magnification is provided by the objective lens and not by the eyepiece. The eyepiece merely increases the resolution of the image viewed. C. magnification is provided by the objective and not by the eyepiece. The eyepiece merely increases the brightness of the image viewed. D. the magnification is m1 + M2, where m1 is the lateral magnification of the objective and M2 is the angular magnification of the eyepiece. E. the image of the objective serves as the object for the eyepiece.
There is a current I flowing in a clockwise direction in a square loop of wire that is in the plane of the paper. If the magnetic field B is toward the right, and if each side of the loop has length L, then the net magnetic force acting on the loop is
a.
2ILB.
b.
ILB.
c.
IBL2.
d.
zero.