If the size of the charge value is tripled for both of two point charges maintained at a constant separation, the mutual force between them will be changed by what factor?
a. 9
b. 3
c. 1/3
d. 1/9
e. 1
a
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We say that the Moon is gibbous when
A) it appears to be more than half illuminated, but not full. B) it appears to be less than half illuminated, but not new. C) it is exactly half illuminated. D) we see a thin crescent of light. E) the Moon is visible in the morning.
Jason takes off from rest across level water on his jet-powered skis. The combined mass of Jason and his skis is 75 kg (the mass of the fuel is negligible)
The skis have a thrust of 200 N and a coefficient of kinetic friction on water of 0.10. Unfortunately, the skis run out of fuel after only 48 s. What is Jason's top speed? A) 81 m/s B) 48 m/s C) 13 m/s D) 130 m/s
A charged particle (q = ?8.0 mC), which moves in a region where the only force acting on the particle is an electric force, is released from rest at point A. At point B the kinetic energy of the particle is equal to 4.8 J. What is the electric potential difference VB ? VA?
a. ?0.60 kV b. +0.60 kV c. +0.80 kV d. ?0.80 kV e. +0.48 kV
A rectangular conducting loop is placed near a long wire carrying a current I as shown in Figure OQ31.3. If I decreases in time, what can be said of the current induced in the loop?
1.The direction of the current depends on the size of the loop.
2.The current is clockwise.
3.The current is counterclockwise.
4.The current is zero.
5.Nothing can be said about the current in the loop without more information.