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A cube of wood having an edge dimension of 20.0 cm and a density of 650 kg/m3 floats on water.
(a) What is the distance from the horizontal top surface of the cube to the water level?
(b) What mass of lead should be placed on the cube so that the top of the cube will be just level with the water surface?
Consider two systems, each containing an ideal gas with N particles kept at the same temperature, but different pressures P1 and P2. After reservoirs are combined together what is the change of the entropy? Try to solve this problems in few steps:..
A 54.0 kg ice skater is gliding along the ice, heading due north at 4.10 m/s. What is the minimum value of Ug that allows her to continue moving straight north
You and a close friend stand facing each other. You are as close as you can get without actually touching. If a wire is attached to each of you, estimate the capacitance of this "human capacitor
A small object carrying a charge of -6.00 nC is acted upon by a downward force of 19.0nN when placed at a certain point in an electric field. What would be the magnitude and direction of the force
The attractive electrostatic force between the point charges 7.14×10?6 and has a magnitude of 0.825, find the sign and magnitude of the charge Q
A boy on board a cruise ship drops a 30.0 g marble into the ocean. what is the terminal speed of the marble
The period of rotation of the Moon is about 27 days, 8 hrs. The mass of the Moon is 7.35 x 1022 kg, and the radius of the Moon is 1.74 x 106 m. Find the height of the satellite above the Moon's surface
The average density of the planet uranus is 1.27 x 10^3 kg/m^3. The ratio of the mass of neptune to that of Uranus is 1.19. The ratio of the radius of Neptune to that of Uranus is 0.969. Find the average density of Neptune.
In a single slit diffraction experiment, the width of the slit is 3.1×10-5 m and the distance from the slit to the screen is 2.2 m. what is the linear distance on the screen from the center of the diffraction pattern to the first dark fringe
In a head-on collision, a car stops in 0.16 from a speed of 28. What force is applied to the driver by his seat belt during that fraction of a second
A 60 kg trunk is pushed 4.0 m at constant speed up a 30° incline by a constant horizontal force. Calculate the work done by the weight of the trunk
A 4 kg hammer is accelerated at 4m/s^2 before striking a nail for 1.6 sec find the force of the hammer
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