a 3-kg object is being pushed to the right along a friction surface (no friction) applied force that pushes the object to the right has a magnitude of 45 n

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n