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A penny has a mass of 2.50 g, a diameter of 19.55 mm, and a thickness of 1.55 mm. Calculate the density of the material from which the penny is made.
A 1 kg wheel (hoop) rolls 5 rev. across a horizontal surface (without slipping)a distance of 3.2 m. if the wheel rolls for 3 sec. determine the angular velocity of the wheel
In the alpha decay of 211 Bi to 207 Tl two groups of alpha particles with known energies 6.623 and 6.279 MeV, are observed. What is the energy difference between these two states
A bungee cord is stretched between two poles with a force of 407 N. What is the velocity of a wave on this bungee cord
Electric eels generate electric pulses along their skin that can be used to stun an enemy when they come into contact with it, How much energy is delivered to the unfortunate enemy with a single pulse, assuming a steady current
You need to produce a solenoid that has an inductance of 2.55 ?H . You construct the solenoid by uniformly winding 1.07 m of thin wire around a tube. How long, in centimeters, should the tube be
Starting from rest, a 40 kg body reaches a speed of 8.0m/s in 2s. Calculate the force acting on the body?
Consider a balloon being filled up with oxygen. You have approximately 30 moles of oxygen gas in this balloon with volume 1.3 m^3. compute the temperature of the molecules
A 15-kg block rests on a level frictionless surface and is attached by a light string to a 5.0-kg hanging mass where the string passes over a massless frictionless pulley
The train comes to a stop 6m from the point at which it was released. What is the magnitude of train's acceleration after its wheel begins to stick.
Ray decides to paint the outside of his uncle's house. He uses a 4.0-m-long board supported by cables at each end to paint the second floor. find the force that the right cable exerts on the board
What is the ratio of the dynamic viscosity of air to that of water at standard pressure and a temperature of 20?C? Find the ratio of the kinematic viscosity of air to that of water for the same condition?
A ball is dropped from the top of a 48.0m high cliff. At the same time, a carefully aimed stone is thrown straight up from the bottom of the cliff with a speed of 20.0m/s . The stone and ball collide part way up. how far from the base did this ..
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