An elevator is accelerating upward 3.5 m/s2 and has a mass of 300 kg. the force of gravity is 2,940 n. what is the tension force pulling the elevator up?

Ahot-air balloon is drifting straight downward with a constant speed of 2.40 m/s. when the balloon is 7.63 m above the ground, the balloonist decides to drop one of the ballast sandbags to the ground below. how much time elapses before the sandbag hits the ground?

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2