A student hypothesizes that water from infrequently used school faucets contains more chemical impurities than the water from frequently used faucets At the same time of day, the student uses a water test kit to measure the water impunities from the different faucets Which is the manipulated variable in
this investigation?
The time of Day when the water is collected
The chemicals used to test the water
the amount of water per sample
the locations of water collection

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.      

explanation: