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Two small charged spheres are placed so that their centres are 12.5 cm apart. The force of repulsion exerted by one charged sphere on the other is 0.432 N. if the charge on one of the spheres is +2.50x10^-7C, then the charge on the other sphere is?
A girl swings back and forth on a swing with ropes that are 4.00m long. The maximum height she reaches is 1.50m above the ground, What is the girl's maximum speed
If the top of the tank, where the flow meter says 15L/min is 0.25 m above the patient's bed, what is the actual flow rate the patient is experiencing? You may assume the pressure in the supply line to the mask is the same as the tank; and, the pre..
a centrifuge can be used to separate cells from a liquid. to increase the rate at which objects can be separated from
Two snowballs are moving directly toward each other along a vertical axis. Just before the snowballs collide, Draw a before and after picture of the collision
The spindle of a stirrer rotating at 2100 rpm slows down uniformly to 900 rpm while making 80 revolutions. Compute the angular acceleration of the stirrer and the time required to slow down.
find the force required to give a helicopter of mass m an acceleration of 0.25g upward. what would be the apparent
While car 1 is parked, a second vehicle, car 2 (with a mass of 1.5 x 10^3kg), travels at a constant speed of 18km/h, hitting car 1 in the rear bumper.
The single cable supporting an unoccupied construction elevator breaks when the elevator is at rest at the top of a 175 m high building.
The starter motor of a car engine draws a current of 200 A from the battery. The copper wire to the motor is 4.90 mm in diameter and 1.2 m long, How much charge passes through the starter motor
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 61.22 diopters, How far is the blackboard from her eyes
Estimate the time the ball is in contact with the floor to be 0.06 seconds. Compute the average force the floor exerts on the ball.
A 78 g basketball is launched at an angle of 47.3 and a distance of 16.6 m from the basketball goal. What speed must the player give the ball
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