If a lever lifts a load four times the effort applied and the effort distance is 5 times the load distance, calculate its efficiency.​

Gunpowder residue is most likely to show up where on a shooters hands

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

Heterogeneous mixture with larger particles that never settle is