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Imagine that you put a block of copper with a mass of 320 g and initial temperature of -35°C into an insulated cup containing 420 g of water at 22°C. After everything has come to equilibrium, by how much has entropy of both water and the copper changed? Explain why the coating of ice that initially forms around the copper is irrelevant.
A rock with mass 2.0 kg is projected from the ground with an initial velocity that has magnitude 14.0 m/s, what is the gravitational potential energy of the rock
A railroad car of mass 3.0 104 kg moving at 4.00 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
questionsome of properties of a diatomic molecule no can be described in terms of a effortless model in which two atoms
question1a wooden rod of insignificant mass and length 83.0 is pivoted about a horizontal axis through its center. a
Baseball and the Washington Monument On August 25, 1894, What was the ball's direction of motion when caught? answer in degree
A 100 g meter stick is allowed to pivot about its center. A 1 g bb is shot at the end of the stick (where it is embedded) causing it to rotate, What is the initial velocity of the bb
Rotates a 1.00 kg discus along a circular path of radius 1.04 m. The maximum speed of the discus is 17.0 m/s. Find out the magnitude of the maximum radial acceleration of the discus.
A 120-V motor has mechanical power output of 3.00 hp. It is 88.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
A 67.5 kg circus performer slides4.10 m down a pole to the circusfloor, starting from rest. What is the kinetic energy of the performer as shereaches the floor
The voltage across a membrane forming a cell wall is 74.0 mV and the membrane is 8.80 nm thick. What is the electric field strength
If the stretch of a spring is doubled, the force it exerts is also doubled. By what factor does the spring’s potential energy increase? Two bullets are fired at the same time with the same kinetic energy. If one bullet has twice the mass of the oth..
An excited electron in Na atom emits radiation at a wavelength 589nm and returns to the ground state. If the mean time for the transition is 20ns, ineherent width in the emission line.
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