Two blocks with masses m1=0.25kg and m2=1.4kg approach each other along a horizontal, frictionless track. the initial velocities of the blocks are v1=1.20 m/s to the right and v2=0.34 m/s to the left. the two blocks then collide and stick together as shown in the figure. which of the graphs could represent the force of block 1 on block 2 during the collision.

Which of the following represents an upside-down image?

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

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.