A ball is thrown straight upward from ground level with a speed of How much time passes before the ball strikes the ground if we disregard air resistance?

Water flows through a garden hose which is attached to a nozzle. the water flows through hose with a speed of 2.19 m/s and through the nozzle with a speed of 19.8 m/s. calculate the maximum height (in m) to which water could be squirted if it emerges from the nozzle and emerges with the nozzle removed.

Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano. the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? a.positive force, balanced force, negative force b.negative force, balanced force, positive force c.positive force, unbalanced force, negative force d. negative force, unbalanced force, positive force

The uncertainty δp sets a lower bound on the average momentum of a particle in the nucleus. if a particle's average momentum were to fall below that point, then the uncertainty principle would be violated. since the uncertainty principle is a fundamental law of physics, this cannot happen. using δp=2.1×10−20 kilogram-meters per second as the minimum momentum of a particle in the nucleus, find the minimum kinetic energy kmin of the particle. use m=1.7×10−27 kilograms as the mass of the particle. note that since our calculations are so rough, this serves as the mass of a neutron or a proton.