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A man with mass 70.0 kg stands on a platform withmass 25.0 kg. He pulls on the free end of a rope thatruns over a pulley on the ceiling and has its other end fastened tothe platform. The mass of the rope and the mass of the pulley canbe neglected, and the pulley is frictionless. The rope is verticalon either side of the pulley.What is the acceleration of the rope relativeto him?
A ball is thrown from the ground into the air. At a height of 9.1 m, the velocity is observed to be v = 7.1i + 6.8j, What will be the total horizontal distance traveled by the ball
There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 Hz that can travel up to 10 km. The intensity level of these sounds can reach103dB, measured a distance of4.5m from the source. Determine the ..
Steel train rails are laid in 12.2 m -long segments placed end to end. The rails are laid on a winter day when their temperature is-2.00degrees C. How much space must be left between adjacent rails
Illustrate what is the maximum vertical displacement that he ball reaches during its trajectory?
A college student is working on her physics homework in her dorm room. Her room contains a total of 6x 10^26 gas molecules. As she works, her body is converting chemical energy into thermal energy at a rate of 125 W.
A radar station locates a sinking ship at range 17.5 km and bearing 136° clockwise from north. How far apart are the plane and ship
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 9 A, and that of the vacuum cleaner is 5.5 A. Determine the power consumed by the vacuum cleaner.
A student m = 81 kg runs at a velocity vi = 2.25 m/s before jumping on a skateboard. After jumping on the board the student has a velocity vf = 1.75 m/s. What is the mass of the skateboard in kg
An ideal monatomic gas is the working substance of a Carnot engine. During the isothermal expansion the volume doubles. Compute the temperature of the reservoirs between which the engine operates
A 1.3-kg 16-cm-diameter solid sphere is rotating about its diameter at 69 rev/min. what is the new angular speed of the ball
The temperature of 1.3 kg of water is 34° C. To cool the water, ice at 0° C is added to it. The desired final temperature of the water is 11° C. determine how much mass m of ice should be added
An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27 °C. A 500-g sample of silver at an initial temperature of 87 °C is placed in the water. Calculate the mass of the aluminum cup
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