Why don't most of the particles that make meteors actually reach the surface of Earth?

A) They are too small and burn up in the atmosphere.
B) They reflect off the atmosphere and return to space.
C) They are too small and are slowed to a stop in the atmosphere.
D) They are deflected by the solar wind.
E) They are deflected by the gravity of the Moon.


A) They are too small and burn up in the atmosphere.

Physics & Space Science

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Consider a two-body system of the Earth orbiting the Sun. The center of mass would be located near the _________

a. Sun b. Earth c. Moon d. midway point

Physics & Space Science

Joshua is attracted toward Earth by a 500-N gravitational force. The Earth is attracted toward Joshua with a force of

A) zero.
B) 250 N.
C) 500 N.
D) 1000 N.
E) none of the above

Physics & Space Science

A horizontal tube consists of a 7.0-cm diameter pipe that narrows to a 2.0-cm-diameter throat. In the pipe, the water pressure is twice atmospheric pressure and the water flows with a speed of 0.40 m/s

What is the pressure in the throat, assuming that the water behaves like an ideal fluid? The density of water is 1000 kg/m3, and atmospheric pressure is 1.01 × 105 Pa. A) 1.9 atm B) 0.12 atm C) 2.1 atm D) 2.0 atm

Physics & Space Science

A proton's rest mass is 1.67 × 10^?27 kg. Calculate its total energy when it is accelerated to a speed of 0.80 c

a. 1.5 × 10^?10 J b. 1.0 × 10^?10 J c. 2.5 × 10^?10 J d. 2.0 × 10^?10 J e. 7.5 × 10^?10 J

Physics & Space Science