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A person holds a 2.0-kg carton of milk at armslength. If the biceps muscle is attached to the forearm at a point8 cm from the elbow joint, what force must be exerted by the muscle? You mayignore the weight of the forearm.
q1. a wheel ofdiameter 30 cmturns through10.5 revolutionswhile rolling without slipping on a surface. what distance
Electrons emitted by the photoelectric effect are accelerated and then strike a phosphorescent screen, causing it to glow more brightly than the original scene.
A 6.4kg ball, hanging from the ceiling by a light wire 135cm long, is struck in an elastic collision by a 1.80 ball moving horizontally at 4.20 m/s just before the collision. Find the tension in the wire just after the collision.
An airplane is flying with a velocity of 86.0 at an angle of 23.0 above the horizontal. When the plane is a distance 114 straight above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
a bowling ball with a mass of 5 kg and traveling with a velocity of 4 ms-1 collides with an aluminum ball of 4 kg
A car travels at a constant speed around a circular track whose radius is 2.6 km. compute the magnitude of the centripetal acceleration of the car
a real object is located at the zero end of a meter stick. a large concave mirror at the 100 cm end of the meter stick
A cylinder contains a mixture of helium and argon gas in equilibrium at a temperature of 240 C. Boltzmann's constant is 1.38066 × 10?23 J/K, What is the rms speed of helium
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. The length of each rod is 0.90m, and the mass of each is 0.078 kg. One rod is held in place above the ground, while other flo..
A solid, horizontal cylinder of mass 7.1 kg and radius 0.57 m rotates with an angular speed of 5.84 rad/s about a fixed vertical axis through its center. What is the final angular speed of the system
A pressurized water reactor produces hot water at 2000 psia and 600 deg F. This is supposed to produce saturated steam at 500 psia in the steam generator. Feed water to the steam generator is at 300 deg F.
A child throws a stone horizontally from the top of a 15 m cliff with a speed of 10 m/s. If the stone weighs 2 N, find its kinetic energy and speed
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