A 18.0-g ball is attached to a 110-cm-long string and moves in a horizontal circle (see the figure). The string exerts a force on the ball that is equal to 0.210 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.

In a system, when potential energy decreases, then entropy also decreases. true false

Rohit is trying to tune an instrument