A binary star system in the constellation Orion has an angular separation between the two stars of 1.2 × 10^-5 radians. If l = 5 × 10^-7 m, what is the smallest aperture (diameter) telescope that may be used to resolve the two stars?
a. 10 cm
b. 5 cm
c. 50 cm
d. 1 m
e. 4 cm
B
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Our Moon:
was formed by the collision of Earth with a Mars-sized protoplanet. was a separate small planet before it was captured by Earth's gravity. is 93 million miles away from Earth. is 4.3 light years away from Earth. has a composition similar to Earth's core.
You press a stick that has a varying cross-sectional area horizontally between the palms of your hands. The area of the stick pushing against your left palm is twice the area of the stick pushing against your right palm.The force on your left palm is __________ the force on your right palm
a. 1/4 b. 1/2 c. equal to d. 2 times e. 4 times
The redshift due to the Doppler effect is caused by
A) sources of light moving toward the Solar System. B) sources of light moving away from the Solar System. C) sources of light obscured by interstellar dust. D) sources of light moving at right angles to the Solar System. E) an effect not yet believed to be understood.
No matter where you live on Earth, the Sun is always directly overhead at noon
Indicate whether the statement is true or false