Un cuerpo que está en reposo sobre una superficie experimenta fuerza de rozamiento?

Porque crees que el agua no podia subir mas de 10 m de altura con ese tipo de bomba

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)