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A constant retarding torque of 15 m-N stops a "rolling" wheel of diameter 0.90 m in a distance of 20 m. How much work does the torque do?
A 3 meter diamter steel excess hatch is located 20 meter (center of gravity) below the water level of an intake structure. What is the total force on the hatch
A sensitive gravimeter at a mountain observatory finds that the free-fall acceleration is 9.00×10?3m/s2 less than that at sea level
A 115 V fish-tank heater is rated at 120 W, Calculate the current through the heater when it is operating
Assuming that the mass of the planet is distributed with spherical symmetry, what is its mass.
A laser beam is incident on two slits with a separation of 0.10 mm, and a screen is placed 4.00 m from the slits. what is the wavelength of the laser light
An object in simple harmonic motion has an amplitude of 0.377 m and an oscillation period of 0.620 s. Determine the maximum speed of the motion
Determine the orbital speed of a satellite that circles the Earth with a period of 2.50 104 s. The mass of the Earth is 5.97 1024 k
Earth's atmosphere is constantly bombarded by cosmic ray protons that originate somewhere in space. What would be the electric current intercepted by the total surface area of the planet
A loudspeaker of mass 18.0 {rm kg} is suspended the distance of h = 1.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 2.70 {rm m}. What is the tension T in each of the cables? Utili..
A mass of 2 kg is attached to a spring with spring constant k=100 N/m. What is the period of oscillation for the mass
A slide projector has a lens of focal length 150 mm. An image of 100 cm by 100 cm is formed of a slide whose dimensions are 50 mm by 50 mm
If the pressure of the 1.2-cm3 volume is reduced to 1.2 × 10?11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
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