Which of the following is typical of a Terrestrial planet?
a) evidence for volcanic activity
b) a hydrogen-rich composition
c) an average density much less than that of rock
d) the presence many moons
e) an orbit outside the asteroid belt
Ans: a) evidence for volcanic activity
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Angular momentum is defined as
A. Moment of inertia * velocity B. Mass * angular velocity C. Mass * velocity D. Moment of inertia * angular velocity
A square and a circular loop with the same area lie in the xy-plane, where there is a uniform magnetic field pointing at some angle q with respect to the positive z-direction. Each loop carries the same current, in the same direction. Which magnetic torque is larger?
1.the torque on the square loop 2.the torque on the circular loop 3.the torques are the same 4.more information is needed
In a double slit experiment, the intensity of the light reaching the center of he screen from one slit alone is I0 and intensity of the light reaching the center from the other slit alone is 9I0. When both slits are open, what is the intensity of the light at the minima nearest the center?
A. 4/0 B. 0 C. 8/0 D. 2/0
According to the special theory of relativity, which of the following happens to the length of an object, measured in the dimension parallel to the motion of its inertial frame of reference, as the velocity of this frame increases with respect to a stationary observer?
a. the length remains constant b. the length vanishes to zero when velocity equals half the speed of light c. the length increases d. the length decreases