A planet is discovered to orbit around a star in the galaxy Andromeda, with the same orbital diameter as the Earth around our sun
If that star has 4 times the mass of our sun, what will the period of revolution of that new planet be, compared to the Earth's orbital period? A) four times as much
B) one-half as much
C) one-fourth as much
D) twice as much
E) times as much
B
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In what direction does a comet's tail point?
A. along the comet's orbit in the direction the comet is moving B. toward the Sun, pulled by its gravity C. away from the Sun D. perpendicular to the comet's orbit E. trailing the comet in its orbit
The Moon and Sun are approximately the same physical size
Indicate whether the statement is true or false
What observational evidence supports the fact that our universe is static and unchanging?
a. detection of the cosmic microwave background (CMB) b. dark sky at night c. redshift of galaxies d. evolution of galaxies with distance e. None of the other choices are correct.
A steel bracket ABCD (EI 5 4.2 3 106 N?m2), with span length L 5 4.5 m and dimension a 5 2 m, is subjected to load P 5 10 kN at D. The maximum deflection at B is approximately:
(A) 10 mm
(B) 14 mm
(C) 19 mm
(D) 24 mm
