While a roofer is working on a roof that slants at 43.0 above the horizontal, he accidentally nudges his 93.0N toolbox, causing it to start sliding downward, starting from rest. Part AIf it starts 4.60m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 21.0N ?
Answers: 2
Physics, 22.06.2019 18:50
An insulated thermos contains 148 g of water at 72.7 หc. you put in a 11.7 g ice cube at 0.00 หc to form a system of ice + original water. the specific heat of liquid water is 4190 j/kgโขk; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
Answers: 2
Physics, 22.06.2019 22:20
One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 โ 103 m/s and sticks, given the collision lasts 6.00 โ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.
Answers: 2
Physics, 22.06.2019 22:30
You add 800 ml of water at 20c to 800 ml of water at 80c what is the most likely final temperature of the mixture ? a. 100c b. 60c c. 25 c d.50c
Answers: 1
While a roofer is working on a roof that slants at 43.0 above the horizontal, he accidentally nudges...
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