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A 4kg watermelon is balanced on Bruce's shaved. R. Lee Ermey, who hates watermelons with every fiber of his being, shoots a 50g arrow at it with a speed of 30m/s. The arrow passes through the melon and emerges at 18m/s. Find the speed of the melon as it flies off Bruce's head.
A car slams on its brakes and skids 50m before coming to a stop. If the coefficient of kinetic friction is 0.65 how fast was the car initially going
If we drop a small metal sphere into the water and watch its motion, it will quickly reach terminal velocity. what is the Reynold's number of this sphere
In San Francisco a very simple technique is used to turn around a cable car when it reaches the end of its route. The car rolls onto a turntable, what is the net torque (in N*m) applied to the car
A 1 012-kg satellite orbits the Earth at a constant altitude of 93-km. What is the change in the system's potential energy
A wave of amplitude 0.30 m interferes with a second wave of amplitude 0.20 m. What are the (a) largest and (b) smallest absolute values of the resultant displacement that can occur, and under what conditions will these maxima and minima occur?
The volume of 9 mol of a monatomic gas is increased from 3 L to 6 L at constant pressure. The initial temperature of the gas is 31?C. How much heat must be supplied to the gas
When an earthquake occurs, two types of sound waves are generated and travel through the earth. how far (in terms of m) is the seismograph from the earthquake
What force (magnitude) does the spring exert on the object while it is a distance 2.90×10-2 below equilibrium position, moving upward.
With the switch open the ammeter reads 1.00 A. What is the resistance of resistor R2 to an appropriate precision and what is the potential difference across R2 when the switch is open?
A uniform magnetic field B is perpendicular to the plane of a circular loop of radius r. Find the emf in the loop as a function of time
A .230 kg baseball is thrown with a speed of 41 m/s. If the above ball comes to rest in the catcher's mitt in .085 seconds, how much force does the ball apply on the catcher's mitt
A chair of mass 13.0kg is sitting on the horizontal floor; the floor is not frictionless, Use Newton's laws to calculate the normal force that the floor exerts on the chair
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