a ball is thrown vertically down from the edge of a cliff with a speed of 5.2m/s how high is the cliff if it took 11s for the ball to reach the ground

Describe the path of a ray that approaches a mirror parallel to the principal axis.

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.