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Two railroad cars, each og mass 6500-kg and traveling 95 km/h,collide head-on and come to rest. How much thermal engery is produced on the collision?
When the string is pulled a distance of 40 cm in 2.50 s, the wheel turns though 5 revolutions. what is the average angular velocity of the wheel
Raw sewage is raised vertically by 5.49m in the amountof 1.89*106 liters each day. What is the power output of the shift station pump
A physics professor, equipped with a rocket backpack, steps out of a helicopter at an altitude of 592 m with zero initial velocity. (Neglect air resistance.), What is the duration of her slowing-down period
a flat conducting loop is positioned in a uniform magnetic field directed along the x axis. for what orientation of the
a 2.0-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. the elastic
your sister wants to participate in the yearly science fair at her high school and asks you to suggest some exciting
Two friends hold on to a rope, one at each end, on a smooth, frictionless ice surface. What is the magnitude of the angular momentum of the system comprised of the two friends
If the terminals of a battery are connected across two identical resistors in series, the total power delivered by the battery is 8.0 W. what is the total power delivered by the battery
A person is riding a bicycle, and its wheels have an angularvelocity of +20 rad/s. Then the brakes are applied and the bike isbrought to a uniform stop. What is the angular accleration (in rad/s^2) of each wheel
a meter rule hangs motionless supported at 30cm mark. It has a 0.02kg mass hanging from the 0meter mark
Calculate, using Newton's law of gravity, the size of the force of attraction between the Earth and a mass of 5.0kg on the Earth. Data: Distance to the center of Earth from thesurface = 6370 km. Mass of Earth = 5.98*1024 kg.
The radius of Venus's orbit is 0.72 times that of Earth's orbit. How much stronger is the Sun's gravitational field at Venus than at the earth.
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