A 0.67 ?F parallel plate capacitor has air between the plates with a separation of 0.33 mm
(a) What is the plate area?
(b) What charge is on the plates when connected to a 3.0 volt battery?
(a) 25. m2
(b) ± 2.0 ?C
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Alex throws a 0.250-kg rubber ball down onto the floor. The ball's speed just before impact is 5.30 m/s, and just after is 3.71 m/s. If the ball is in contact with the floor for 0.028 s, what is the magnitude of the average force applied by the floor on the ball?
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Which of the following best describes what would happen if a 1.5-solar-mass neutron star, with a diameter of a few kilometers, were suddenly (for unexplained reasons) to appear in your hometown?
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