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A sled, initially at height h is sliding down an incline and then it continues moving on the horizontal plane until it stops. What's the energy required to drag it back up?
A 0.61-mm-diameter copper wire carries a tiny current of 2.6A. The molar mass of copper is 63.5 g/mole and its density is 8900 kg/m3. NA=6.02×1023. Estimate the electron drift velocity. Suppose one free electron per atom. Express your answer to two i..
A cook puts 9.20 g of water in a 2.00-L pressure cooker that is then warmed to 470°C. What is the pressure inside the container
person leaning over a 124 m deep well accidentally drops a siren emitting sound of frequency 2430 hz. What beat frequency does this person perceive
A 2.1 multiplied by 103-kg car starts from rest at the top of a 4.5-m-long driveway that is inclined at 16° with the horizontal. find the speed of the car at the bottom of the driveway
A daredevil is shot out of cannon at 41.1o to the horizontal with an initial speed of 26.1 m/s. Find at what height above cannon should the net be placed
Calculate the final equilibrium temperature assumning no heat loss after mixing occurs.
A fly appears to be upside down and three times its actual size when viewed during a converging lens with a focal length of 5.1 cm. How far is the fly from the lens?
A man is riding a bicycle, and its wheels have an angular velocity of 18.1 rad/s. Determine how much time does it take for the bike to come to rest
A small rubber ball is launched by compressed-air cannon from ground level with an initial speed of 11.8 m/s directly upward. How long does it take to reach the maximum height
A football is thrown horizontally with an initial velocity of (18.9 m/s)x. Calculate the direction of the velocity with respect to the positive x-axis at this time
A 0.300 kg ball is thrown vertically upward with an initial speed of 16.0m/s. What is the maximum height reached by the ball
An airplane is flying with a velocity of 246 m/s at an angle of 30.0° with the horizontal, as the drawing shows. When the altitude of the plane is 2.7 km, a flare is released from the plane. The flare hits the target on the ground. What is the angle ..
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