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An airplane flying at a speed of 700km/h at a height of 900m drops a relief pacakage. Assume that the horizontal velocity of the relief package at this instant is 700 km/h. What is the range of the relief package?
A flywheel in the form of a uniformly thick disk of radius 1.23 m, has a mass of 45.1 kg, Calculate the constant torque required to stop it in 1.25 min
Two cars of the same mass collide at an intersection. Just before the collision one car is traveling east at 40.0 km/h and the other car is traveling south at 70.0 km/h. what is the speed of the cars immediately after the collision
Estimate the linear separation of two objects on the planet Mars that can just be resolved under ideal conditions by an observer on Earth who is:
Heather and Jerry are standing on a bridge 45m above a river. Heather throws a rock straight down with a speed of 19m/s. Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Overlook air resistance. How much t..
When a 2.50-kg object is hung vertically on a certain light spring descrbied by Hooke's law, the spring stretches 2.76 cm. What is the force constant of the spring
A physics book slides off a horizontal tabletop with a speed of 2.70m/s . It strikes the floor in 0.350s . Ignore air resistance. Find the height of the tabletop above the floor
Two point charges are separated by 6 cm. The attractive force between them is 20 N. Find the force between them when they are separated by 12 cm. (Why can you solve this problem without knowing the magnitudes of the charges?)
A softball of mass 0.220 kilogram that is moving with a speed of 4.0 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Estimate the mass of the target ball
20 g of helium are placed in a cylinder with a movable piston. What is the maximum temperature reached during the compression
When a potential difference of 12 is applied to a wire 6.7 long and 0.31 in diameter the result is an electric current of 2.2. calculate the resistivity of the wire
A blender is switched to a lower speed and the angular velocity of its blade decreases uniformly from 52 rad/s to 12 rad/s. Through what angle does the blade turn during this time
A physics student is standing on an initially motionless,frictionless turntable with rotational inertia 0.31kg·m2. He's holding a wheel of rotational inertia0.22 kg·m2 spining at 128 rpm about a vertical axis, as we showed inFig. 11.8.
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