400 N of load can be overcome by an effort of 50 N by using a lever. Calculate the mechanical advantage of the lever.

What is an electric motor? explain its operation. 2-3 sentence

Which type of reaction is shown in this energy diagram? energy products activation energy reactants time o a. endothermic, because energy is released to the surroundings o b. exothermic, because energy is absorbed from the surroundings o c. exothermic, because energy is released to the surroundings o d. endothermic, because energy is absorbed from the surroundings

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving