A man weighs 650 N while on the surface of Earth. If he is transported to the planet Mythos, which has the same mass as Earth but a radius that is five times larger than Earth's, his weight would be
A. 16,250 N.
B. 26 N.
C. 3,250 N.
D. 130 N.
E. 650 N.
Answer: B
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A 1.0-g bead is at (-2.0 cm, 2.0 cm), a 2.0-g bead is at (2.0 cm, -4.0 cm), and a 3.0-g bead is at (2.0 cm, 0.0 cm). What are the coordinates of the center of mass of this system of beads?
What will be an ideal response?
Sea levels have risen recently, and will probably rise further in the future, due to
A) ozone depletion caused by increased CFCs and other ozone-destroying chemicals. B) global warming caused by increased CFCs and other ozone-destroying chemicals. C) ozone depletion caused by increased CO2 and other greenhouse gases. D) acid rain caused by compounds of sulfur and nitrogen in coal. E) global warming caused by increased CO2 and other greenhouse gases.
Classify the following statement as a characteristic
(a) of electric forces only, (b) of magnetic forces only, (c) of both electric and magnetic forces, or (d) of neither electric nor magnetic forces. The force exerted on a charged object is proportional to its speed.
1.electric forces 2.magnetic forces 3.both electric and magnetic forces 4.neither electric nor magnetic forcesWhen a cube is inscribed in a sphere of radius r, the length L of a side of the cube is 
. If a positive point charge Q is placed at the center of the spherical surface, the ratio of the electric flux ?sphere at the spherical surface to the flux ?cube at the surface of the cube is
A.
.B.
.C.
D.
.E.
.