A 2.25-kg object is attached to a horizontal an ideal massless spring on a frictionless table. What should be the spring constant of this spring so that the maximum acceleration of the object will be g when it oscillates with amplitude of 4.50 cm?
What will be an ideal response?
Answer: 490 N/m
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Which of the following is not an advantage of the Hubble Space Telescope over ground-based telescopes?
A) It is closer to the stars. B) Stars do not twinkle when observed from space. C) It can observe infrared and ultraviolet light, as well as visible light. D) It never has to close because of cloudy skies.
The strong gravitational field of a white dwarf slows down the speed of escaping light, and results in the gravitational redshift.
Answer the following statement true (T) or false (F)
A ball is thrown at a 60.0° angle above the horizontal across level ground. It is thrown from a height of 2.00 m above the ground with a speed of 20.0 m/s and experiences no appreciable air resistance
The time the ball remains in the air before striking the ground is closest to A) 16.2 s. B) 3.07 s. C) 3.32 s. D) 3.53 s. E) 3.64 s.
A sinusoidally varying potential difference has amplitude 170 V. What is its minimum instantaneous value?
1.170 V 2.120 V 3.0 4.-120 V 5.-170 V