What is speed? Definition. Units of speed. Calculate one of distance, speed or time given the other two variables.

Multiplication and division skills are useful when solving speed, distance and time problems. It may be useful to review how to calculate speed, distance and time.

How do Cepheid variables indicate distance? The length of these stars' pulsations is always related to their intrinsic brightness. Astronomers can use this knowledge to calculate distance.

Did you know you can measure distances on Google Maps? This nifty feature can help determine how long and how far you have to go.

Right after you see lightning, start counting the seconds until you hear thunder. Let's use "D" for distance...So the distance you are from the storm is equal to S (seconds) divided by five.