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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 chest x ray uses 14 keV photons. A 65 kg person receives a 35 mrem dose from one x ray that exposes 25% of the patient's body
Scientists want to place a 3600.0 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.8 times the radius of Mars above the surface of the planet. What is the force of attraction between Mars and the satell..
Gas is contained in an 8.09 liter vessel at a temperature of 20.6oC and a pressure of 8.84 atm. Determine the number of moles of gas in the vessel. How many molecules are in the vessel
A golf ball rolls off the top of a flight of concrete steps of total vertical height 2.40m. what is the bounce height on the fourth bounce
Two metal spheres of different sizes are charged such that the electric potential is the same at the surface of each, What is the ratio QB/QA and EB/EA
The energy of the first excited state of a hydrogen atom is -0.34eV +/- 0.0004eV. What is the minimum average lifetime for this state
A long, straight wire lies in the plane of a circular coil with a radius of 0.050 m. The wire carries a current of 6.0 A and is placed along a diameter of the coil. What is the net flux through the coil
A suitcase falls out of an airplane which is 400 meters above the ground. What is the time it takes for the suitcase to reach the ground
The temperature of 1.3mol of an ideal diatomic gas goes from 20?C to 57?C at a constant volume. What is the change in entropy
A hot-air balloon is rising upward with a constant speed of 2.68 m/s. When the balloon is 5.62 m above the ground, How much time elapses before the compass hits the ground
what is the value of the R that gives zero pressure? write down it in terms of h, W and fundamental constants.
A baseball outfielder throws a 0.150 kg baseball at a speed of 45.0 m/s and an initial angle of 28.0°. Illustrate what is the kinetic energy of the baseball at the highest point of its trajectory?
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