# physics

The earth's atmosphere extends to a height of nearby 200KM above its surface there many be explosion and noises taking place in the outer space but we do not hear them.why?

1. 0
2. 3
1. Sound is propagated through the atmosphere by the motion of air molecules. No air, no sound.

1. 0
posted by Damon

## Similar Questions

1. ### Astronomy

Atmospheric pressure is simply the weight (remember Newton’s Laws) of the atmosphere pushing down divided by the area upon which the atmosphere is pushing. The metric units of pressure are Newtons/m2 (also called a Pascal; you
2. ### science help PLS

Which of the following correctly describes a way in which Earth’s atmosphere interacts with the hydrosphere? Living organisms breathe gases in the atmosphere. Water moves between Earth’s surface and the atmosphere. Gases in
3. ### Science

1.)Why is Earth’s temperature just right for life? (1 point) A.)Earth’s core is hot enough to heat Earth’s surface. B.)Earth’s magnetic field creates suitable temperatures on Earth’s surface. C.)Earth’s crust is warmed
4. ### meteorology

Compared to the planet's average radius (6371 km or 3959 mi), the atmosphere is like the thin skin of an apple. About 99% of the atmosphere's mass occurs within about 32 km (20 mi) of Earth's surface. Hence, the thickness of the
5. ### physic

During fair weather, an electric field of about 100 N/C points vertically downward into the earth's atmosphere. Assuming that this field arises from charge distributed in a spherically symmetric manner over the surface of the
6. ### PHYSICS

Four billion years ago the Sun’s radiative output was 30% less than it is today. (i) If we assume the radius of the sun is the same, and that the Earth’s atmosphere was the same as it is now (that is, the atmosphere absorbs