Explain why, in space, "no one can hear you scream."
What will be an ideal response?
Screams, and any sound that we make, are waves of gas atoms and molecules. We perceive sound when these waves of gas particles strike our eardrums and cause them to vibrate, but it takes many trillions of such particles to move them noticeably. In interstellar space, where the gas density is extremely low, there are too few (if any) collisions with our eardrums for us to hear sound.
You might also like to view...
In the Copernican model, Venus moves around an epicycle centered on a line between Earth and the Sun
Indicate whether the statement is true or false
How long does it take an M class star to reach the main sequence, compared to a solar type star?
A) a tenth as long B) about the same, 30 million years C) about twice as long D) about twenty times longer E) longer than the age of the Galaxy
Two identical objects A and B fall from rest from different heights to the ground and feel no appreciable air resistance. If object B takes TWICE as long as object A to reach the ground, what is the ratio of the heights from which A and B fell?
A) hA/hB = 1/ B) hA/hB = 1/2 C) hA/hB = 1/4 D) hA/hB = 1/8
If a hydrocarbon is not aliphatic, it is ______________
Fill in the blank(s) with correct word