Physics, 27.11.2019 05:31, needhelp243435
In a ballistics test, a 24 g bullet traveling horizontally at 1300 m/s goes through a 25-cm-thick 360 kg stationary target and emerges with a speed of 930 m/s. the target is free to slide on a smooth horizontal surface. how long is the bullet in the target? what average force does it exert on the target? what is the target's speed just after the bullet emerges?
Answers: 1
Physics, 22.06.2019 07:30, babygreg2001p97abr
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?
Answers: 1
Physics, 22.06.2019 21:40, iancuteodora30
Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.
Answers: 1
In a ballistics test, a 24 g bullet traveling horizontally at 1300 m/s goes through a 25-cm-thick 36...
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