Physics, 02.12.2019 21:31 shakira11harvey6
Askier of mass 71 kg is pulled up a slope by amotor-driven cable. the acceleration of gravity is 9.8 m/s2.how much work is required to pull him 62 mup a 31â—¦slope (assumed to be frictionless) ata constant speed of 2.58 m/s? answer in units of kj
Answers: 1
Physics, 22.06.2019 19:30
A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.
Answers: 1
Physics, 22.06.2019 20:10
On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)
Answers: 1
Physics, 22.06.2019 23:00
How much energy will be transferred to your eardrum while listening to this sound for 1.0 min?
Answers: 1
Askier of mass 71 kg is pulled up a slope by amotor-driven cable. the acceleration of gravity is 9.8...
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