Physics, 07.10.2019 23:30 kenaygardel
Blocks a (mass 4.50 kg) and b (mass 8.50 kg) move on a frictionless, horizontal surface. initially, block b is at rest and block a is moving toward it at 3.00 m/s. the blocks are equipped with ideal spring bumpers. the collision is head-on, so all motion before and after the collision is along a straight line. let +x be the direction of the initial motion of block a.
a) find the velocity of block a when the energy stored in the spring bumpers is maximum.
b) find the velocity of block a when the energy stored in the spring bumpers is maximum.
c) find the velocity of block b when the energy stored in the spring bumpers is maximum.
d) find the velocity of block a after they have moved apart.
e) find the velocity of block b after they have moved apart.
Answers: 1
Physics, 21.06.2019 23:00
Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?
Answers: 1
Physics, 22.06.2019 19:30
Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.
Answers: 1
Physics, 22.06.2019 19:30
What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical
Answers: 2
Blocks a (mass 4.50 kg) and b (mass 8.50 kg) move on a frictionless, horizontal surface. initially,...
Mathematics, 30.04.2021 20:20
Mathematics, 30.04.2021 20:20
Mathematics, 30.04.2021 20:20
Mathematics, 30.04.2021 20:20
Mathematics, 30.04.2021 20:20
Social Studies, 30.04.2021 20:20
Chemistry, 30.04.2021 20:20
History, 30.04.2021 20:20
Mathematics, 30.04.2021 20:20
English, 30.04.2021 20:20
English, 30.04.2021 20:20
History, 30.04.2021 20:20