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A piece of copper at 320 degrees celcius is dropped into 1.9 kg of water at 16 degrees celcius. If the equilibrium temperature is 21 degrees celcius , what is the mass of the copper?
Two arrows are fired simultaneously with the same speed of 30.0 m/s. What is the magnitude of the total momentum of this two-arrow system
A thief was trying to pull a 20 kg coffer (a coffer is a box usually used to hold valuables) along an essentially frictionless horizontal surface. What was the work done on the coffer by the rope
a powered rotating disc roates with a constant 2.27 rads2 angular acceleration. after 3.98 s it has rotated through an
The coefficient of kinetic friction between a suitcase and the floor is 0.272. how far can it be pushed across the level floor with 630J of work
An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed above room temperature, and a 356 Hz tuning fork is held at the open end. Resonance is heard when the piston is at a distan..
When looping the loop, the Blue Angels stunt pilots of the U.S Navy fly their jet aircraft along a vertical circle of diameter 1000 m. At the top of the circle, find the acceleration relative to the aircraft of a small body
A rock is thrown from the roof of a building with a velocity vo and an angle of alpha(o) from the horizontal, Calculate the magnitude of the velocity of the rock just before it strikes the ground
Given an ordinary cylindrical glass with a volume of one half liter and filled completely to the top with water at room temperature (20C), What would be the vapor pressure for this fluid
A spaceship of mass 2.2×106kg is cruising at a speed of 5.4×106m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the speed of the third piece
A boy whirls a stone in a horizontal circle of radius 1.9 m and at height 1.8 m above level ground. obtain the magnitude of the centripetal acceleration of the stone
A radar station locates a sinking ship at range 15.6 km and bearing 136° clockwise from north. From the same station, a rescue plane is at horizontal range 19.6 km, 160° clockwise from north, with elevation 2.10 km. (a) Write the displacement vector ..
question a baseball diamond is a square with side 90 ft. a batter hits the ball and runs toward first base with a speed
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