A 0.17 kg baseball is thrown with a speed of 38.m/s and it is hit straight back to the pitcher with a speed of 62.m/s. What is the magnitude of the IMPULSE exerted upon the ball by the bat?
What will be an ideal response?
17 N?s
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Two vehicles with equal magnitudes of momentum traveling at right angles to each other undergo an inelastic collision. The magnitude of momentum for the combined wreck is
A) the same as the magnitude of momentum of either car before collision. B) less than the magnitude of momentum of either car before collision. C) greater than the magnitude of momentum of either car before collision. D) none of the above
Why do we think tiny quantum ripples should have been present in the very early universe?
A) The shock wave of the Big Bang caused ripples that expanded outward with time. B) The energy released when the strong force froze out of the GUT force caused shock waves that produced ripples in the universe. C) Matter and antimatter particles that spontaneously formed from high-energy photons caused perturbations in the radiation field. D) The annihilation of matter and antimatter particles caused tiny explosions that perturbed the radiation field. E) Quantum mechanics requires that the energy fields at any point in space be continually fluctuating as a result of the uncertainty principle.
People can snorkel down to a depth of roughly one meter. This means that the additional pressure on the air in their lungs is roughly
A. 9800 N. B. 9800 Pa. C. 9800 ATM. D. 19,600 N. E. 19,600 N/m2.
Why should the experimenter avoid using the end of a meter stick when making a measurement?