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A laser (wavelength 600nm) passes through a 2.44mm circularapertue and hits a screen 1km away. What is the diameter of the spot on the screen?
A boat with a horizontal tow rope pulls a water skier. how much work does the rope do on the skier during a forward displacement of 270m
A skier is slinding downhill at 11 m/s when she reaches an icy path on which her skies more freely with negligible friction. find the speed of the skier at the bottom of the icy path
A 55.0 kg crate rests on a level floor at a shipping dock. What horizontal pushing force is required to just start the crate moving
A 2.7 kg mass acceleration speed at 10 m/s2 in a direction 38? north of east. One of the two forces acting on the mass has a magnitude of 10.6 N and is directed north. Determine the magnitude of the second force.
A meterstick (L = 1 m) has a mass of m = 0.217 kg. Initially it hangs from two short strings: one at the 25 cm mark and one at the 75 cm mark. Where is the angular acceleration of the meterstick a maximum
question1a small object with a mass of 420 mg carries a charge of 40.0 nc and is pending by a thread between the
A transformer has 683 turns in its primary winding and 109 in its secondary winding. Assuming it has 100 percent efficiency, By what factor does it change the current
While moving in, a new homeowner is pushing a box across the floor at a constant velocity. The coefficient of kinetic friction between the box and the floor is 0.41. The pushing force is directed downward, at an angle theta below the horizontal.
Two very long solenoids have thesame length, but solenoid A has 15 times the number of turns, 1/4the radius, and 7 times the current of solenoid B. Calculate the ratio of the magnetic field inside of A to that inside B.
A physics student on Planet Exidor throws a ball, and it follows the parabolic trajectory, What was the ball's launch angle
two formula one racing cars are negotiating a circular turn and they have the same centripetal accelaration. however
Which would have a higher kinetic energy , an airplane travellingat the speed of sound or an airplane with half the weight of the first plane and travelling twice the speed of sound ?
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