When are eclipse seasons?
A) in the spring and fall
B) in the summer and winter
C) when the nodes of the Moon's orbit are nearly aligned with the Sun
D) when Earth and the Sun are aligned with one another
E) during an eclipse
C
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The observed slowing down of time predicted by Einstein's Special Theory of Relativity for an object traveling close to the speed of light is referred to as
A) time dilation B) time expansion C) a time warp D) time contraction
During a lunar eclipse, the Moon, Earth, and Sun all lie on the same line, with the Earth between the Moon and the Sun
The Moon has a mass of 7.36 × 1022 kg; the Earth has a mass of 5.98 × 1024 kg; and the Sun has a mass of 1.99 × 1030 kg. The separation between the Moon and the Earth is given by 3.84 × 108 m; the separation between the Earth and the Sun is given by 1.496 × 1011 m. (a) Calculate the force exerted on the Earth by the Moon. (b) Calculate the force exerted on the Earth by the Sun. (c) Calculate the net force exerted on the Earth by the Moon and the Sun.
A package is oscillating on a spring scale with a period of 4.60 s. At time t = 0.00 s the package has zero speed and is at x = 8.30 cm. At what time after t = 0.00 s will the package first be at x = 4.15 cm?
A) 0.575 s B) 0.767 s C) 1.15 s D) 1.30 s E) 1.53 s
Why are older rocks more likely to be found on the continents than on the ocean floor?
What will be an ideal response?