In the early part of the 1900's, some felt that space travel was not possible; in space, there is no air for the spacecraft to push back on, therefore, by Newton's 3rd law, forces cannot be exerted on the spaceship and spacecrafts cannot change direction nor speed. The solution to this is to eject fuel at high speeds. The fuel is ejected to the back to make the rocket speed up. The fuel is ejected to the front to make the rocket slow down, and the fuel is ejecred sideways to change directions. This is the principle behind rockets. A rocket of total mass 589 kg (including fuel) is moving at 8 kilometers/sec relative to the Earth. It ejects 98 kg of burnt fuel backwards at an average speed of 2 kilometers/sec relative to the Earth. How fast is the rocket moving after this fuel is ejected

Did the proton move into a region of higher potential or lower potential? did the proton move into a region of higher potential or lower potential? because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of higher potential to a region of lower potential. because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of lower potential to a region of higher potential. because the proton is a positive charge and it slows down as it travels, it must be moving from a region of higher potential to a region of lower potential. because the proton is a positive charge and it slows down as it travels, it must be moving from a region of lower potential to a region of higher potential. request answerpart bwhat was the potential difference that stopped the proton? express your answer with the appropriate units.î”v î” v = nothingnothingrequest answerpart cwhat was the initial kinetic energy of the proton, in electron volts? express your answer in electron volts. ki k i = nothing ev request answerprovide feedback

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change? work power gravitational energy chemical energy