At what point is the Moon farthest away from Earth?
a. apogee
b. perigee
c. umbra
d. penumbra
e. prominence
Ans: a. apogee
Physics & Space Science
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The resistivity of the material of a wire is 1.76 × 10-8 ?m. If the diameter of the wire is 2 × 10-3 m and its length is 2 m, what is its resistance?
A) 112 ? B) 11.2 ? C) 1.12 ? D) 0.112 ? E) 0.0112 ?
Physics & Space Science
The most circular of the elliptical galaxies are class
A. Sb. B. E7. C. Irr 1. D. E0. E. Ea.
Physics & Space Science
Emission nebulae like M42 occur only near stars that emit large amounts of
A) infrared heat. B) X-rays and gamma rays. C) microwaves. D) ultraviolet radiation. E) visible light.
Physics & Space Science
If you cross a vector with itself, the resultant will be a unit vector
Indicate whether the statement is true or false
Physics & Space Science