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A 10m uniform beam of weight 100 N is supported by two ropes at the ends. If a 400N person sits at 2.0 m from the left end of the beam, what is the tension in the left rope?
A large pot is placed on a stove and 1.2 kg of water at 14°C is added to the pot. The temperature of the water is raised evenly to 100°C just before it starts to boil. What amount of heat is absorbed by the water in reaching 100°C
A large asteroid of mass 71700 kg is at rest far away from any planets or stars. What is the speed of the second asteroid
A) Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal? B) Which is more useful for storing heat, this metal or an equal weight of water? defin..
A helicopter is lifting two crates simultaneously. One crate with a mass of 160 kg is attached to the helicopter by cable A. The second crate with a mass of 73 kg is hanging below the first crate and attached to the first crate by cable B. As the hel..
An astronaut weighs 275 lbs with equipment here on the surface of the earth. If he goes to a planet where the acceleration of gravity is 12.5 ft/s/s, What will be his mass be there
A girl floats in a lake with 97 percent of her body beneaththe water. What is her mass density
A converging lens, which has a focal length equal to 8.2 cm, is separated by 32.5 cm from a second lens. Find the position of the final image using both a ray diagram and the thin-lens equation
a horizontal circular platform rotates counterclockwise about its axis at the rate of 0.805 rad/s. You, with a mass of 67.3 kg, Calculate the total angular momentum of the system
A 30-meter steel tape is correct at a temperature of 20.0(C). The distance between two points, as measured by this tape on a day when the temperature is 5 (C), is 25.970m. What is the true distance between the points?
A thick, vertical iron pipe has an inner diameter of 0.065 meter. A thin aluminum disk, heated to a temperature of 85oC, has a diameter that is 3.9 x 10-5 meter greater than the pipe inner diameter. Evaluate the temperature of the aluminum disk
A 2.50 g lead bullet traveling at 560 m/s strikes a target, converting its kinetic energy into thermal energy. It's initial temperature is 40.0°C. Find the heat required to melt the bullet
A uniform line of charge that is 20.0 cm long has a total charge of -6.00 ?C. What is the electrostatic force on the electron
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