Earth and the moon could not have condensed from the same materials because they have different densities and compositions
Indicate whether the statement is true or false
T
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Large molecular clouds will form into protostars because of ____
a. the thermal motions of the atoms in the gas cloud b. gravitational contraction c. radiation pressure from nearby stars d. the temperature reaching a critical point e. condensation of dust and gas
Considering the three general types of geometry (flat, spherical, and saddle-shaped). If the spacetime of the universe is infinite, what might the geometry of the universe be?
A) either flat or saddle-shaped B) flat, spherical, or saddle-shaped C) only flat D) either flat or spherical E) only spherical
An apple falls from a tree and hits the ground 5 meters below with a speed of about
A) 5 m/s. B) 10 m/s. C) 15 m/s. D) 20 m/s. E) not enough information
In a Newton's rings apparatus, find the phase difference (in radians) when an air wedge of 500 nm thickness is illuminated with red light (? = 640 nm)
a. 13 b. 11 c. 9 d. 7 e. 3