The Sun exerts almost 200 times more force on the oceans of the Earth than the Moon does. Why then, is the Moon more effective in raising tides?
What will be an ideal response?
Answer: Tides are caused by differences in gravitational pulls. The Moon pulls with proportionally more force on the side of Earth nearest the Moon than the far side. This difference in pulls is greater than the corresponding difference in the pulls by the more distant Sun.
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Energy and Momentum: A 0.140-kg baseball is dropped from rest from a height of 2.20 m above the ground and experiences negligible air resistance as it falls. It rebounds to a height of 1.60 m. What change in the ball's momentum occurs as it rebounds from the ground?
A. 0.117 kg ? m/s upwards B. 0.117 kg ? m/s downwards C. 1.70 kg ? m/s upwards D. 0.350 kg ? m/s upwards E. 0.350 kg ? m/s downwards
How many types of quarks are there, and how many types of antiquarks?
A.) 24 quarks and 24 antiquarks. B.) 12 quarks and 6 antiquarks. C.) 6 quarks and 6 antiquarks. D.) 3 quarks and 3 antiquarks. E.) 30 quarks and 0 antiquarks.
Light can behave as a particle or as a wave
a. True b. False Indicate whether the statement is true or false
The Sun has an apparent magnitude of about
a. minus 1.4. b. minus 27. c. 1.4. d. 15.6.