What is the mass of the string
A 2.30-m-long string is under 24.0 of tension. A pulse travels the length of the string in 60.0 ms what is the mass of the string
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a 0.85m long string experiences a tension of 220N with velocity of 280m/s. what is the mass of the string
A dam is used to block the passage of a river and to generate electricity. Approximately 5.73 x 104 kg of water fall each second through a height of 19.6m. I one half of the gravitational potential energy of the water were converted to electrical
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In a container of negligible mass, 0.150 kg of ice at 0oC and 0.0800 kg of steam at 100 oC are added to 0.200 kg of water that has a temperature of 40 oC. If no heat is lost to the surroundings, and the pressure in the container is constant at 1.0
A boat crosses a river of width 130 m in which the current has a uniform speed of 1.57 m/s The pilot maintains a bearing perpendicular to the river and a throttle setting to give a constant speed of 0.957 m/s relative to the water.
A 4.75 crate is suspended from the end of a short vertical rope of negligible mass. An upward force is applied to the end of the rope, and the height of the crate above its initial position is given by +(0.61 ) What is the magnitude of the force w
The passengers on the ship measure a time of 40h for the trip. What time would an observer on one of the two planets measure for the same trip?
Among the most energetic cosmic rays ever detected are protons with energies of about 10^20 eV. Find the momentum of such a proton and compare with that of a 25-mg insect crawling at 2mm/s
A boy shoots a BB gun horizontally at a target 14 m away. The gun is aimed directly at the center of the target, but the small metal BB hits 56 cm lower. Neglecting any air resistance, what was the initial speed of the BB.
A weather balloon rises through the atmosphere, its volume expanding from 5.0 to 14 as the temperature drops from 23 to -7. If the initial gas pressure inside the balloon is 1.0 atm, what is the final pressure?
A car is moving at 487 m/s. The driver sees a pothole in the road 31 m ahead and applies the breaks. The car is traveling at 29 m/s when it hits the pothole. For how long did the car decelerate before it hit the pothole? Give your answer to the neare
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