A 5.00 kg ball is traveling at 4.0 m/s and strikes a wall. The ball bounces off the wall with a velocity of 4.0 m/s in the opposite direction. If the contact with the wall by the ball lasts for 0.10 seconds, then the magnitude of the impulse on the ball is
A. 24 kg m/s.
B. 30 kg m/s.
C. 36 kg m/s.
D. 40 kg m/s.
E. 50 kg m/s.
D. 40 kg m/s.
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Which of the following statements regarding the determination of surface habitability and subsurface habitability of a planet is correct?
A) both surface and subsurface habitability can be determined only from robotic space probes B) surface habitability can be determined remotely by studying reflected starlight from a planet, while determining subsurface habitability would require a robotic space probe C) both surface and subsurface habitability can be determined by analyzing reflected starlight D) subsurface habitability can be determined remotely by studying reflected starlight from a planet, while determining surface habitability would require a robotic space probe
Many objects in the sky, including the Sun, primarily emit blackbody radiation because they are mostly:
A) composed of only electrons. B) opaque. C) composed of only protons. D) translucent.
Which of the following telescopes is best suited for studying the hottest intergalactic gas (10 million K) in a cluster of galaxies?
Which of the following telescopes is best suited for studying the hottest intergalactic gas (10 million K) in a cluster of galaxies?
Earth's magnetic field affects cosmic rays by
A) deflecting them. B) slowing their speeds. C) destroying them. D) absorbing them.