Given the following measurement….1000 miles/hour….what does the “1000” part of the measurement represent?

A general rule for estimating the distance in miles between an observer and a lightning bolt is to count the number of seconds between seeing the lightning and hearing it, and dividing by

Density can be defined as:

When we say that an astronaut in the ISS is “weightless”, what is meant is that he/she          

Both liquids and gases are classified as fluids.  What characteristic do they share that    classifies them that way.

A continuous change of position is called

A continuous change of position is called

One result of the Doppler effect is that the sound waves from a sender (a siren for example) arrive at increasingly more frequent intervals at the receiver (your ear for example) as the sender moves closer to the receiver, and the sound has

One result of the Doppler effect is that the sound waves from a sender (a siren for example) arrive at increasingly more frequent intervals at the receiver (your ear for example) as the sender moves closer to the receiver, and the sound has

To cancel a sound, two identical sound waves must be produced, but they must be