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You place 73 moles of hydrogen gas in a balloon of volume 2.6 m3, and find the pressure to be 1.4 times atmospheric pressure. What is the typical speed of a hydrogen molecule?
A toy cannon uses a spring to project a 5.30 g soft rubber ball. The spring is originally compressed by 5.00 cm, At what point does the ball have maximum speed
The velocity selector in the figure is designed to allow charged particles with a speed of 4700 m/s to pass through undeflected. Find the magnitude of the required electric field
Heat is added to 1.00 10^3 cm^3 of water at atmospheric pressure. The water's temperature increases by 30.9°C. Find the increase in the water's internal energy
A uniform cylinder of mass m=8.26 kg and radius R=0.147 m is released from rest on an inclined plane (theta=42.4 deg), What is the magnitude of the angular velocity just before the cylinder reaches the horizontal surface
A metal ring having an outside radius of 38.0 cm, and an inside radius of 30.5 cm, has a mass of 15.0 kg. What is the moment of inertia of the ring
A 6.43 kg ball is thrown upward with an initial speed of 14.34 m/s. Ignore air resistance when answering the following questions. What is the ball's initial kinetic energy
A person pulls a 5.0 kg sled by a rope across a floor. The coeffecient of kinetic friction between the floor and the sled is 0.15. What is the horizontal acceleration of the sled
A 23 kg child goes down a straight slide inclined 38? above horizontal. The child is acted on by his weight, How large is the normal force of the slide on the child
The output piston of a hydraulic press has a cross-sectional area of 0.20 cm2. What force is applied to the input piston if that piston has a diameter of 5.0 cm
What is the angular acceleration of the wheel? If the wheel was initially at rest and the torque is applied for 15 s, what will be the rotational frequency of the wheel
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.877 rad/s. You, with a mass of 70.5 kg, compute the total angular momentum of the system
a boy hears an eco of his own voice from a distant hill after 1s. The speed of the sound is 340m/s. What is the distance of the hill from the boy
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