Which skateboarder has greater momentum? Skateboarder A: mass = 60 kg; velocity = 1.5 m/s
Skateboarder B: mass = 50 kg; velocity = 2.0 m/s

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.

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above