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A 1.20 kg ball and a 4.00 kg ball are connected by a 74.0 cm long massless, rigid rod. The structure rotates about its center of mass at 230 rpm. What is the rotational kinetic energy of the structure?
A 0.49 kg block attached to a spring with force constant 150 N/m is free to move on a frictionless, At that instant, find the force on the block
What is an acceleration of two falling sky divers (mass 100.0 kg including parachute) when the upward force of air resistance is equivalent to one-fourth of their weight. How fast would the father be moving.
A power factor is 0.72 lagging and the power dissipated is 375W. 120V and a resistance of 10 ohms, showing all working out.
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.
What is force necessary on one end of apparatus in order to lift the car? How much work is done lifting the car?
In a certain particle accelerator, protons travel around a circular path of diameter 20.5 m in an evacuated chamber, What is the mean free path of the gas molecules
A boy throws a ball into an open window 10m above his shoulder at 65 degrees with the horizontal. He observes that the ball flies in horizontal. A. What is the initial speed of the ball
A 500 g, 3 m uniform thin rod is pivoted at one end and has a mass 500 g attached to its other end. Ignore friction and air resistance. Find the moment of intertia of the physical pendulum
An artificial earth satellite has a circular orbit of radius 7.10 multiply.gif 106 m in an equatorial plane. Compute the (constant) speed of the satellite
think about the modes of substances in the gas phase and explain why potential energy is included in the thermal energy of some substances in the gas phase, when a monatomic solid/liquid turns into a gas, what are the PE and KE equal to then
A resistor (R = 900 ?), a capacitor (C = 0.25 µF), and an inductor (L = 2.5 H) are connected in series across a 240 Hz AC source for which ?Vmax = 110 V. calculate the phase angle between the current and voltage
A rock is thrown vertically upward from ground level at time t = 0. At time t = 1.8 s it passes the top of a tall tower, What is the height of the tower
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