What are the two most important properties of a telescope? Select exactly two responses.
A. light-collecting area
B. retinal intensity
C. angular resolution
D. magnification
Ans:
A. light-collecting area
C. angular resolution
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Fundamental Forces: Inside the nucleus, the strongest of the four fundamental forces is
A. the weak nuclear force. B. the electromagnetic force. C. the gravitational force. D. the strong nuclear force.
A 1.0-g bead is at (-2.0 cm, 2.0 cm), a 2.0-g bead is at (2.0 cm, -4.0 cm), and a 3.0-g bead is at (2.0 cm, 0.0 cm). What are the coordinates of the center of mass (or center of gravity) of this system of beads?
What will be an ideal response?
Y dwarfs are substellar objects with temperature above 500 K
Indicate whether the statement is true or false
If we had sent a radio signal to an advanced civilization in 2006 which is located in the zeta reticuli star system approximately 39 light-years away and the signal was immediately replied to, when would the reply arrive back at Earth?
A) 2084 B) 2012 C) 2045 D) 2039