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Rusting of an iron nail is an example of a change of phase, true or false? This seems like a tricky question, because it is a chemical change-but would that be considered a change of phase?
0.20 moles of Helium gas that initially occupies a volume of 4.0L under a total pressure of 1.0x10^5 Pa, What is the specific heat at constant temperature
The air-conditioning system of a department store is designed to maintain a pressure of 0.22 in. find the net force due to pressure on a rectangular display window
The coil wand pendulum starts swinging with an angle of 30 degrees with the vertical. After it passes through the magnetic gap, the pendulum rises to a level which makes 10 degrees with the vertical. What is the energy lost by the pendulum
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. find the period of a satellite in a geosynchronous orbit
a hydraulic jack has an in[put piston area of 2 cm^2 and an output piston area of 18 cm^2. What will be the pressure on the oil
A 148 gram baseball is hit toward the left by a bat. The magnitude of the force the bat exerts on the ball as a function of time, Find the magnitude of the impulse that the bat imparts to the ball
An electron of mass 9.1 * 10^-31 kg is moving in the xy-plane; its speed is 2.0 * 10^5 m/s, What are the components of the momentum of the electron
A disk with mass m = 8.5 kg and radius R = 0.35 m begins at rest and accelerates uniformly for t = 18.8 s, to a final angular speed of ? = 28 rad/s. What is the moment of inertia of the disk?
A loudspeaker of mass 15.0 is suspended a distance of h = 2.30 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.30. What is tension in each cable.
Three point charges -q,-q, and 2q occupy the verices of an equilateral triangleof side a. Find the electric field at the center of the triangle
A Federation starship ( 2.20×10^6kg ) uses its tractor beam to pull a shuttlecraft ( 2.20×10^4kg ) aboard from a distance of 12.0km away. The tractor beam exerts a constant force of 4.0×104N on the shuttlecraft. Both spacecraft are initially at..
If the sphere is enclosed in a room whose walls are kept at -5°C, what is the net flow rate of energy out of the sphere
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