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The tank is shelling at a target that is 4km away and 60m above ground. If the shell is being fired at 30degrees above the horizontal, what should be the release speed of the shell?
While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass, how fast is the person running
A helicopter is ascending vertically with a speed of 5.00m/s . At a height of 120m above the Earth, a package is dropped from a window. Evaluate how much time does it take for the package to reach the ground?
Suppose that you wish to mold a uniform wire from 1.50 g of copper. The wire needs to have a resistance of 0.0400 ohm's, What should be the diameter fo the wire?
I put a packing peanut on top of it, and it only took one rotation--or crank--to knock the material off from the machine and onto the ground. mass of the peanut=.001 kg, distance from the machine to the peanut=.0005m.
A cannonball sits on top of a 10 meter cliff and is fired at a 10 degree angle with an initial velocity of 50 m/s. What is the maximum height of the cannonball relative to the ground? At maximum height what is the magnitude of the velocity? How lo..
Two trains are moving in opposite directions on parallel tracks and are approaching a station. What is the speed of the other train if an observer at the station hears a beat frequency of 4.4Hz
A 2100 kg car moving east at 10 m/s collides with a 3000 kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 35 ° north of east and at a speed of 5.03 m/s. Find the speed of the 3000 kg car before th..
Consider the reaction 4He + 40Ca -> 3H + 21Sc Find the minimum laboratory kinetic energy for the 4He projectile if 40Ca is stationary
You are working on the analysis of rocks brought back from the Moon, What is the density of the rock
If a feather is dropped on the moon falls 81.7cm in one second, calculate the acceleration due to gravity on the moon
A box of mass 38.5 kg is sitting on a horizontal table top with a coefficient of kinetic friction between the box and the surface of 0.49. Find the magnitude of the acceleration of the box on the table
A stone thrown horizontally from a height of 5.72 m hits the ground at a distance of 13.50 m. Calculate the speed of the stone as it hits the ground
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