Which of the following equations can be used to directly calculate an object's impulse? a) p = mvt b) p = m/v c) p = fδt d) δp = fδt

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

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)