Answer:
D) It contains compounds and is therefore a substance
Explanation:
A mixture is composed of multiple compounds.
The discharge in the stream at a given cross-section and the level of the stream is described by a rating curve<span>. Average velocities and the cross-sectional area of the stream are measured for a given stream level. The velocity and the area give the discharge for that level. After measurements are made for several different levels, a </span>rating table<span> or rating curve may be developed. Once rated, the discharge in the stream may be determined by measuring the level, and determining the corresponding discharge from the rating curve. If a continuous level-recording device is located at a rated cross-section, the stream's discharge may be continuously determined.</span>
Speed up.
Enzymes are used to speed up chemical reactions by being a catalyst. Without enzymes, every action we performed would be slowed down dramatically.
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Another difference between the two forces is the fact that gravitation only attracts, while electrical forces attract when the electrical charges are opposite and repel if the charges are similar. Thus, gravitation is considered a mono-pole force, while electrostatics is a dipole force.
