Why is thermal escape of atmospheric gas much easier from the Moon than from Earth?
A) The Moon's average surface temperature is lower than Earth's.
B) The Moon lacks a global magnetic field, while Earth has one.
C) Outgassing on the Moon releases gases with lower masses than does outgassing on Earth.
D) The Moon's gravity is so much weaker than Earth's.
D
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The production of exotic ____ particle pairs in the core of a high-mass star has a significant effect on the fusion of heavy elements
a. electron-positron b. electron-proton c. proton-antiproton d. neutrino-antineutrino e. baryon-antibaryon
The main lens or mirror of a telescope is called the ____________________
Fill in the blank(s) with correct word
A block slides down a frictionless inclined ramp. If the ramp angle is 17.0° and its length is find the speed of the block as it reaches the bottom of the ramp, assuming it started sliding from rest at the top
A) 13.1 m/s B) 172 m/s C) 9.26 m/s D) 24.0 m/s
When a flower petal is 4.0 cm in front of a convex lens, the inverted image is half the height of the petal. What is the focal length of this lens?
A) 1.3 cm B) 2.0 cm C) 4.0 cm D) 5.3 cm