Aworker pushes horizontally on a large crate with a force of 178.8 n, and the crate is
moved 3.9 m. how much work was done?

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

What are similarities and differences between refraction, reflection, diffraction and absorption?

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults