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the inner and outer surfaces of a cell membrane carry a negativeand positive charge respectively because of these
an elevator is moving downward but has a constand upwardacceleration of a35ms2 at a moment when the elevator speed is
a spherical mirror is polished on both sides when used as a convexmirror the magnification is 17 what is the
a block of mass 50kg is pushed 20m along a frictionlesssurface by a constant horizontal force of 60nwhat is the net
a satellite has a mass of 99kg and is located at20x106m above the surface of eartha what is the potential energy
you are standing on the edge of a turntable with frictionless bearings it is initially rotating when you catch a ball
a race driver has made a pit stop to refuel after refuelinghe leaves the pit area with an acceleration whose magnitude
consider a ski lift of length 50 km assume it takes about 60 min for a gondola to travel all the wayup if there are 12
a 8 kg hammer strikes a nail at avelocity of 89 ms and comes to restin a time interval of 80 msa what is the impulse
a submarine is submerged to a depth of 650 ft in the atlantic ocean find the air pressure in psi needed to blow water
a drop of water on a countertop reflects light from a flowerheld 35 cm directly above it the flowers diameter is 25 cm
a 504-g bullet is shot through a099-kg wood block suspended on a string200 m long the center of mass of the block rises
the angular speed of a propeller on a boat increases with constantacceleration from 109 rads to 240 rads in 220
the drive train of a bicycle includes wheels 673 cm indiameter and pedal cranks 175 cm long the cyclist pedals at
a 100-v battery is connected to a 120-ohm resistor ignoring the internal resistance of the battery calculate the power
a disk of mass m and radius r rolls back and forth on avertical track of radius aa write the langrangian for the
after you pick up a spare your bowling ball rolls withoutslipping back toward teh ball rack with a linear speed of v
a wedge of mass m and angle alpha is resting on africtionless horizontal plane a rectangular box of mass m is onthe
a puck of mass 8 kg moving at 8ms strikes an identical puck that is stationary on frictionlessice after the collision
an ice cube is placed in a microwave oven suppose the ovendelivers 97 w of power to the ice cubeand that it takes 32170
after hitting a long fly ball that goes over the rightfielders head and lands in the outfield the batter decides tokeep
a 25 kg projectile is fired by accelerating it with anelectro magnetic rail on the earths surface the rail makes a
a wire of resistance 70 isconnected to a battery whose emf is 20 v and whose internal resistance is 10a how much
a 128 g bulletis fired horizontally into a 93 g woodenblock initially at rest on a horizontal surface afterimpact the
a large 11 kg fish moving east at 2ms swallows a small 1 kgfish moving west at 7ms toward itwhat is the total momentum