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A satellite of Mars, called Phobos, has an orbital radius of 9.4 106 m and a period of 2.8 104 s. Assuming the orbit is circular, determine the mass of Mars?
To develop muscle tone, a woman lifts a 4.00 kg mass held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. How much work does she do
An engineer has designed a machine to produce electricity by using the difference in the temperature of ocean water at different depths. what is the maximum efficiency of this machine
A 250 g piece of ice at 0°C is placed in 430 g of water at 22°C. What is the final equilibrium temperature of the system
q1. a 4.00 x 100 g glass coffee cup is 22.0 c at room temperature. it is next plunged into hot dishwater at the
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. Find the average density of Neptune
A challenge gaining prominence throughout the planet is the increased need for \"green\" or sustainable energy. how much energy does the wind turbine generate
The sound level measured 5.2 m away from a jet engine is 140 dB. What is the intensity of the sound at 5.2 m? What is the power transmitted by the sound waves? At what distance is the sound level exactly half?
A magnifying lens with a focal length of 5 cm is held 4 cm from an object that is 1cm tall. Find the image distance from the lens
At the surface of an electrically charged solid conducting sphere the electric field has a magnitude of 458 N/C and the electric potential is 164 V lower than it is infinitely far from the sphere
A monochromatic light i incident on a single slit of width of 0.1 mm, and a diffraction pattern is formed at a screen which is 0.7 m away from the slit. The second order bright fringe is at a distance 2 mm from the center of the central maximum.
A puck of mass 0.1 kg slides in a circular path on a horizontal frictionless table at an angular velocity ? of 20 rad/s. What happens to the angular velocity of rotation
A fly sits 9.2 cm from the center of a turntable. Through how many revolutions must the turntable rotate per minute in order for the fly to have an acceleration of 9.8 m/s2 toward the center
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