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A floating ice block is pushed through a displacement d→ = (20.0 m)i^ - (24.0 m)j^ along a straight embankment by rushing water, which exerts a force vector F→ = (228 N)i^ - (144 N)j^ on the block. How much work does the force do on the block during the displacement? Number Units the tolerance is +/-2%
at the top of the loop what is the magnitude of the force exerted on a 55kg rider by the roller-coaster seat?nbspat the
A headphone manufacturer warns that to protect your hearing, What is the corresponding sound intensity
You hold a ruler that has a charge on its tip 2 cm above a small piece of tissue paper to see if it can be picked up, What is the minimum charge required to pick up the tissue paper
suppose a single electron orbits about a nucleus containing two protons 2e as would be the case for a helium atom from
A small button placed on a horizontal rotating platform with diameter 0.328 will revolve with the platform, How far from the axis can the button be placed, without slipping, if the platform rotates at 62.0
a model rocket is fired vertically from rest. It has a net acceleration of 17.5 m/s2. how long after liftoff does the rocket return to the ground
An atomic nucleus of mass 288 u moving at 405m/s emits an alpha particle of mass 4.0 u in the direction of its velocity. If the remaining nucleus slows to 360m/s, what velocity does the alpha particle have when it is emitted.
A loaded ore car has a mass of 950 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch, What maximum power must the motor provide
A small rocket maintains a constant thrust as to produce an acceleration of 2 m/s^2. determine the maximum achieved rocket thrust
Two people are running towards each other. They start from rest 100 m apart. Find the position where they run into each other
Assume a slide similar to the Der Stuka is 35.0 meters high, but is a straight slope, inclined at 45o with respect to the horizontal. If the woman has a speed of 20.0m/s at the bottom, determine the change in mechanical energy due to friction
An astronomer observes electromagnetic waves emitted by oxygenatoms in a distant galaxy that have a frequency of 5.710x10^14 Hz. Determine the relative velocity of thegalaxy
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