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A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, perpendicular to each other, at 17m/s . The third piece has twice the mass as the other two. What is the speed and direction of the third piece?
a merry go round (a disk I=1/2MR^2, M=500 kg, R = 1.5m) roatates at 2m/s. What is the new rotation rate for the merry go round with the child
A point charge of ?3.3 ?C is located in a uniform electric field of 34 N/C. You move the charge, find the resulting change in the electric potential energy of the system
A slide projector needs to create a 96 cm-high image of a 2.20 cm-tall slide. How far should you place the lens from the slide.
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
Determine the maximun wavelength of incident radiation that can be used to remove the remaining electron from a singly ionized helium atom He+ (z= 2)
what magnitude of horizontal force must the person apply to keep it moving with constant velocity? c) If the person continued to push with the force used to start the motion, what would be the acceleration of the trunk.
Assume too that the bullets rebound straight back with no change in speed. What is the magnitude of the average force on Superman's chest from stream of bullets.
if you plot a best-fit line for data on a graph of position vs. time, what units does the lines (vertical) intercept have
Two metal rods, silver and copper, are attached to a steam chamber with a temp 100 C, at one end and an ice bath ( 0 C ) at the other end. How much heat flows through the two rods in 60s
During a ride on the gravitron, a person finds herself stuck against the wall as she spins around with a frequency of 26.00 rpm, What is the diameter of the gravitron ride
A 3.4 kg piece of aluminum at 28°C is placed in 1.0 kg of water in a Styrofoam container at room temperature (20°C)
A 246 kg wooden raft floats on a lake. When a 80kg man stands on the raft, it sinks 4cm deeper into the water. When he steps off, the raft vibrates for a while.
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