a person standing on the ground hears a thunder 4s after seeing a flash of lighting. How high is the cloud from the ground. (speed of sound in air =343m/s)​

Which describe reflection? check all that apply. light bounces off a boundary.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.