The collision of two spiral galaxies will likely result in a single giant spiral galaxy
Indicate whether the statement is true or false
FALSE
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Momentum: A 0.14-kg baseball is dropped from rest from a height of 2.0 m above the ground. What is the magnitude of its momentum just before it hits the ground if we neglect air resistance?
A. 0.28 kg ? m/s B. 0.88 kg ? m/s C. 0.44 kg ? m/s D. 0.62 kg ? m/s E. 1.4 kg ? m/s
The radius of the earth is R. At what distance above the earth's surface will the acceleration of gravity be 4.9 m/s2?
A) 0.41R B) 0.50R C) 1.0R D) 1.4R E) 2.0R
Which kinds of waves can be polarized?
a. longitudinal waves b. dispersed waves c. refracted waves d. sound waves in air e. transverse waves
A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current. The current results because
a. the coil acts like a transformer b. the changing magnetic field induces an electric field in the wire c. an electromagnetic wave is generated d. the wire is ferromagnetic e. none of the above