How fast must the space shuttle go to cover 20,000 meters in 4.0 seconds?

What is the speed of an object at a given moment?

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

Arope has one end tied to a vertical support. you hold the other end so that the rope is horizontal. if you move the end of the rope back and forth with a frequency of 4 hz, the transverse wave you produce has a wavelength of 0.5 m. what is the speed of the wave in the rope?