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A box that weighs 300 N is pulled across a level surface with a constant velocity. The rope makes an angle of 30.0 degrees above the horizontal and the tension in the rope is 100 N. What is the normal force of the floor on the box?
A 110 ball and a 250 ball are related by a 38--long, massless, rigid rod. The balls rotate about their center of mass at 150 what is the speed of the 110 ball.
In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 548 nm. What is the stopping voltage required
A 18.2-? resistor is made from a coil of copper wire whose total mass is 18.5g. What is the diameter of the wire
A plane leaves Seattle, flies 85.0mi{rm mi} at 22.0°^circ north of east, and then changes direction to 54.0°^circ south of east. After flying at 121mi{rm mi} in this new direction, the pilot must make an emergency landing on a field. The Seat..
A 0.75m diameter solid sphere may be rotated about an axis through its center by a torque of 11.5m*N which accelerates it uniformly from rest through a total of 180 revolutions in 16.0 s.What is the mass of the sphere.
at point A, 3.00 m from a small source of sond that is emitting uniformly in all directions, the sound level is 53.0 dB. what is the intensity of the sound at point A
A space probe accelerated uniformly from 50 m/s at t = 0 to 150 m/s at t = 10 sec. How far did it move between t = 2.0 sec and t = 6.0 sec
An airplane is flying with the velocity of 82.0 at an angle of 22.0 above the horizontal. When the plane is a distance 111 straight above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from the dog..
A solid disk of radius 1.60 m and mass 2.3 kg rolls without slipping to the bottom of an inclined plane. what is the height of the inclined plane
a planet has a single moon that is solely influenced by the gravitational interaction between the two bodies. we will
At what time does the bolt hit the top of the still-decending elevator.
A red laser from the physics lab is marked as producing 632.8-nm light. When light from this laser falls on two closely spaced slits, What is the wavelength of light produced by the pointer
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