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The coefficient of linear expansion of copper is 17 × 10-6 K-1. A sheet of copper has a round hole of radius 1.5 m cut out of it. If the sheet is heated and undergoes a change in temperature of 80 K, what is the change in the area of the hole?
A girl pulls a box of mass m = 6 kg across a floor with a constant horizontal force F = 22 N. Initially the block is at rest. For the first d1 = 7 m, What is work done on the box by friction in moving the box over the distance d1 + d2
A wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.68 T pointing to the left. what is the diameter of the coil
A 52.0 kg ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.0 turns each second. The distance from one hand to the other is 1.50 m. Biometric measurements indicate that each hand characterist..
The particle with energy E moves in positive direction toward the potential step Vo > E. Determine the probability to find the particle on the distance x from the potential step.
you are handed an apple that has a mass of 102g. to get a better of idea of what different pressure feel like, what is the pressure of the apple
With a 2 meter lever, the fulcrum is 30 cm from the load of 200 pounds. How much "effort" force will be needed to lift it, Which type of lever describes a wheelbarrow
A proton is located at y=0.06m and has a velocity of 5x10^6 m/s in the +x direction while an electron is located at x=0.08m, What is the magnetic field generated by these two charges at the origin
A railroad car of mass 2.1 104 kg moving at 3.50 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling. what is the bicyclist's speed at the bottom of the hill
The angular momentum of the electron as it moves around the center of the circle is 1.40 × 10-25J•s.Find the radius of the circular path.
The wheels of a wagon can be approximated as the combination of a thin outer hoop, of radius rh = 0.580 m and mass 4.89 kg, what should the radius of the disk be
An antifreeze solution is made by mixing ethylene glycol (? = 1116 kg/m3) with water. determine the volume percentage of ethylene glycol in the solution
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