That part of the wave is called a compression.
The answer is A
Theory- a hypothesis or an educated guess that has yet to be proven by experiment<span />
Answer:
In contrast, the intrinsic brightness of an astronomical object, does not depend on the distance of the observer or any extinction. The absolute magnitude M, of a star or astronomical object is defined as the apparent magnitude it would have as seen from a distance of 10 parsecs (33 ly).
Explanation:
Denser materials tend to be closer to earths center due to their mass gravity is shown by the equation mg
Which stands for mass x gravity.
<span>When an observer is moving towards a stationary object making a sound,
he runs the risk of startling the stationary object.
On the other hand, if the stationary object is the one making the sound,
then the pitch of the sound perceived by the observer is higher than the
sound that the object is actually making.</span>
