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Two ropes are pulling upward on a large crate. The weight of the crate is 420. N. The tension in the left rope is the same as the tension in the right rope. If the crate is moving upward at a constant speed, what is the tension in the left rope?
A fun-loving 10.6 kg otter slides up a hill and then back down to the same place, how much mechanical energy did she lose on the hill
A football quaterback runs 15.0 m staright down the playing field in 2.50s. what are the average velocities for the three intervals
A coin rests on the bottom of a beaker filled with an unknown liquid. A ray of light from the coin travels to the surface of the liquid and is refracted as it enters into the air. How fast is the light traveling in the liquid
A cable is stretched horizontally across the top of two vertical poles 20 m apart. What is the tension in each cable segment
The discovery of a star orbiting the center of our galaxy with a 15-year period has led to the finding, calculate the semimajor axis of the star's orbit
q1. a 4 kg fish swimming 3 ms swallows an absent minded 2 kg fish at rest. what is the speed of the large fish
In an experiment, 300 g of aluminum (with a specific heat of 900 J/kg·K) at 100°C is mixed with 54.0 g of water (4186 J/kg·K) at 20°C, What is the entropy change of the aluminum-water system
What is the amount of the normal force on the charge on the surface in Newtons, when including both the weight of the object and the electric force on it?
A 3.1 kg dog stands on a 15.00 kg flatboat at distance D = 6.1 m from the shore. It walks 2.00 m along the boat toward shore and then stops. Assume no friction between the boat and the water, find how far the dog is then from the shore.
An iron bar 40 cm long is braised to a copper bar 50 cm long and of the same diameter. determine the temperature of the junction point
A point charge with charge is held stationary at the origin. How much work is done by the electrostatic force on the moving point charge
A sled of mass m is given a kick on a frozen pond. The kick imparts to it an initial speed of 3.30 m/s. find the distance the sled moves before it stops
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