A 60-kg swimmer suddenly dives horizontally from a 150-kg raft with a speed of 1.5 m/s. The raft is initially at rest. What is the speed of the raft immediately after the diver jumps if the water has negligible effect on the raft?
What will be an ideal response?
0.60 m/s
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In the Compton effect, as the scattering angle increases, the frequency of the X-rays scattered at that angle
A) increases. B) decreases. C) does not change. D) varies randomly.
A car with a radio antenna 1.0 m long travels at 80 km/h in a locality where the Earth's magnetic field is 5.0 × 10^?5 T. What is the maximum possible emf induced in the antenna as a result of moving through the Earth's magnetic field?
Answer the following statement(s) true (T) or false (F)
1. Consider a point P midway between two identical charged particles. The electric field vector 
at point P is zero
What evidence supports the theory that there is a black hole at the center of our galaxy?
A) We observe an extremely bright X-ray source at the center of our galaxy. B) We can see gas falling into an accretion disk and central mass at the center of our galaxy. C) The motions of the gas and stars at the center indicate that it contains a million solar masses within a region only about 1 parsec across. D) We observe a large, dark object that absorbs all light at the center of our galaxy. E) all of the above