A parallel-plate vacuum capacitor has 7.68 JJ of energy stored in it. The separation between the plates is 3.40 . If the separation is decreased to 1.10 .

a) what is the energy now stored if the capacitor was disconnected from the potential source before the separation of the plates was changed?b) What is the energy now stored if the capacitor remained connected to the potential source while the separation of the plates was changed?

Use the information presented in the graph to answer the questions. which segments show acceleration? which segment indicates that the object is slowing down? what is the velocity of segment b? what is the acceleration of segment b?

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery