The right to retain or revoke is a very strong use of a donor's power. It seems so simple but is it that simple in real life?

An aquarium 12m long, 2m wide, and 7m deep is full of water. The density of water is 1000kg/m^3 and the force of gravity is 9.8m/s^2 a) Find the work needed to pump all of the water out of the aquarium.Work =  Joules. b) Find the work needed to pump half of the water out of the aquarium.Work =  Joules.

There is one part to this question. I need the answer in kg/m^3. Thank you!!

4 نقاط * :An isolated system Is a specified region where transfer of energy and/or mass take place Is one in which mass within the system is not necessarily constant Is a region of constant mass and only energy is allowed to cross the boundaries Cannot transfer either energy or mass to or from the surroundings None of these answers O

During the extinction of the dinosaurs, a meteor with a mass of about 1.4 x10^8 kg hit the ground at a speed of 12km/s. How much energy did the meteor deliver to the ground? (round your answer to 3 significant figures) O 4.20 x 10°8 Joules O 8.40 x 10°8 Joules O 1.01 x 10^10 Joules O 2.02 x 10*10 Joules

How much potential energy due to gravity would a person have if he is standing on top of the building that is 1000 cm high? Assume that he has a mass of 50 kg.

The Grand Coulee Dam is 1270 m long and 170 m high. The electrical power output from generators at its base is approximately 2000 MW. How many cubic meters of water must flow from the top of the dam per second to produce this amount of power if 92% of the work done on the water by gravity is converted to electrical energy? (Each cubic meter of water has a mass of 1000 kg.)

A team of astronauts is on a mission to land on and explore a large asteroid. In addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. With what minimum initial speed ?esc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? Assume that the asteroid is approximately spherical, with an average density ?=2.93×106 g/m3 and volume ?=1.94×1012 m3 . Recall that the universal gravitational constant is ?=6.67×10-11 N·m2/kg2 .vesc = ? m/s

How much work is required to stop an electron (m=9.11×10−31kg)(m=9.11×10−31kg) which is moving with a speed of 1.90×106 m/s ? Express your answer to three significant figures and include the appropriate units.

How much work is required to stop an electron (m=9.11×10−31kg) which is moving with a speed of 1.80×106 m/s ?