Amy counts the wave crests traveling down a stretched string. five wave crests pass amy in two seconds. what is the frequency of the wave?

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Cho is making a bar graph showing the amount of money spent on health care between 1999 and 2005. the dependent variable is the: a: money spent b: year c: number of patients