A source from which organisms generally take elements is called a/an

A. biotic community.

B. reservoir.

C. exchange pool.

D. food web.

Two cars having different weights are traveling on a level surface at different constant velocities. Within the same time interval, greater force will always be required to stop the car that has greater

Does static electricity mean that the charges never move? explain

if a balloon filled with helium weighs 21.6 kg, knowing that helium's density is 0.18 kg/m3 then what is its volume?

When you anticipate the results of your experiment before you begin, you are making a

What kind of lenses are in a light microscope

Which of the following elements is the most reactive? Beryllium Calcium Magnesium Barium

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is: