When mass is accreted into a black hole, how much total mass-energy can be radiated away?
A) .007%
B) .08%
C) 1.4%
D) 20%
E) 50%
D
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A 70-kg swimmer dives horizontally off a 500-kg raft. The diver's speed immediately after leaving the raft is 6.0 m/s. A micro-sensor system attached to the edge of the raft measures the time interval during which the diver applies an impulse to the raft just prior to leaving the raft surface. If the time interval is read as 0.25 s, what is the magnitude of the average horizontal force by diver
on the raft? a. 110 N b. 420 N c. 2 000 N d. 1 700 N e. 24 N
Diffraction Gratings: Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. If the third-order maximum of the diffraction pattern is observed at 32° from the centerline, what is the distance between the slits of the grating?
A. 0.93 ?m B. 1.4 ?m C. 2.8 ?m D. 8.5 ?m
Which are the oldest solar system objects that have been dated radioactively? What are their ages?
What will be an ideal response?
The figures below represent interference fringes. The distances from the screen to the slits is the same for each figure, and the planes of the screen and the slits are parallel. Which figure(s) represent(s) slits with the smallest spacing d between the slits? The white spaces represent the interference maxima.
A. I. B. II. C. III. D. IV. E. V.