In 1974, astronomers broadcasted a radio message of greeting towards the globular cluster M13, 25,000 light-years away
a. True
b. False
Indicate whether the statement is true or false
True
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Force on a Wire: A rectangular coil, with corners labeled ABCD, has length L and width w. It is placed between the poles of a magnet, as shown in the figure If there is a current I flowing through this coil in the direction shown, what is the direction of the force acting on section AB of this coil?
A. perpendicular to and into the page B. perpendicular to and out of the page C. in the direction of the magnetic field D. in the opposite direction of the magnetic field E. The force is zero.
The planets never travel in a straight line as they orbit the Sun. According to Newton's second law of motion, this must mean that
A) the planets are always accelerating. B) the planets have angular momentum. C) the planets will eventually fall into the Sun. D) a force is acting on the planets.
A solid metal sphere of radius r is inside a metal concentric spherical shell of inner radius 2r and outer radius 3r. A charge is place on the solid metal sphere and it is found that the potential at its surface is V1 (at r) and that the potential at
the outer surface of the spherical shell is V3 (at 3r). In terms of V1 and V3, what is the potential at the inner surface of the metal shell (at 2r)? a. 3V1/2 b. V3 c. V1 d. 2V3/2
Convert 4.5 × 10-3 to decimal notation
A) 4.500 B) 0.4500 C) 0.0450 D) 0.0045 E) 0.00045