The figure shows a graph of the acceleration of a 125-g object as a function of the net force acting on it. What is the acceleration at points A and B?
What will be an ideal response?
Answer: A: 16 m/s2, B: 4.0 m/s2
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All massive-star supernovae leave behind black holes as remnants
Indicate whether the statement is true or false
Once a basketball player's feet are off the floor in making a jump, the jumper's acceleration
A) depends on launch speed. B) is usually greater for taller players. C) varies with body orientation. D) is g; no more, no less. E) all of the above
Transformers: The primary coil of an ideal transformer has 100 turns and its secondary coil has 400 turns. If the ac voltage applied to the primary coil is 120 V, what voltage is present in its secondary coil?
A. 100 V B. 30 V C. 70 V D. 480 V E. 400 V
Buoyancy: A hollow steel ball of diameter 3.0 m just barely floats in water. What is the wall thickness of the ball? (?Fe = 7.87 g/cm3, ?water = 1.00 g/cm3)
A. 6.6 cm B. 37 cm C. 131 cm D. 79 cm