Fréquence of 20,000hz is called ULTRASOUND
Answer:
b. Photosynthesis
Explanation:
This because it is an irreversible process.
Answer:
In physics, a force is an influence that can change the motion of an object. A force can cause an object with mass to change its velocity (e.g. moving from a state of rest), i.e., to accelerate. ... A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newton (N).
The correct answer is a blackhole.
A blackhole is the only object in which nothing, not even light can escape.
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Answer:
Surface waves travel along the surface. There are two types of body waves: P-waves travel fastest and through solids, liquids, and gases; S-waves only travel through solids. Surface waves are the slowest, but they do the most damage in an earthquake.
