a quantity that can change, often with a numerical value. For example, position and speed are variables.
the particular number (with units) that a variable may have. For example, 20 feet is a value.
the distance an object travels divided by the time it takes.
the total distance divided by the total time for a trip.
speed that stays the same. Moving at a constant speed means you travel the same distance each second (like perfect cruise control).
a ratio used to convert from one unit to another, such as from feet to meters.
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.
NEW! Voice Recording
Click the mic to start.