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Q. A 23.5 kg gold bar at 27°C is placed in a large, insulated 0.800 kg glass container at 15.0°C with 2.00 kg of water at 25.0°C. Compute the final equilibrium temperature.
A girl sits fixed on a merry-go-round of mass M = 500 kg and radius R = 2 m. The merry-go-round is at first at rest and is free to rotate without friction.
A freight company uses a compressed spring to shoot 1.7 kg packages up a 1m high frictionless ramp into a truck. The spring constant is 241 N/m and the spring is compressed 33 cm.
You're carrying a 3.6-m-long, 25kg pole to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35cm from its tip.
A unit of area, often used in measuring land areas, is the "hectare", defined as 104m2. An open-pit coal mine consumes 66hectares of land, down to a depth of 23m, each year. What volume of earth, in cubic kilometers, is removed in this time.
If an amount of heat equal to magnitude of the work done by friction is absorbed by the crate of fruit and the fruit reaches a uniform final temperature, what is its temperature change DeltaT.
A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance of 1 m from the end of the track after falling the vertical distance 1.25 m from the end of the track.
If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 2.2 m on Earth, what would be his maximum range on the Moon, where free-fall acceleration is g/6 and g = 9.80m/s2.
An 10m, 210N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50° angle with the ground. How far up the ladder can an 850N person climb before ladder b..
A Cassegrain astronomical telescope uses two mirrors to form the image. Compute the radius of curvature of a secondary mirror
Two objects attract each other gravitationally with a force of 2.3×10-10 when they are 0.65 apart. Their total mass is 5.0 . Find out their individual masses.
An ocean liner leaves New York City and travels 56.0° north of east for 170 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the following directions.
Charge q is fired through a small hole in the positive plate of a capacitor. If q is a positive charge, does it speed up or slow down inside the capacitor? reply this question using the concept of force.
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