An electron-volt is
A) the charge of one electron.
B) the energy of one electron.
C) the energy jump between the first and second energy levels of hydrogen.
D) an amount of energy much smaller than a joule.
E) an amount of energy much larger than a joule.
D) an amount of energy much smaller than a joule.
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The Zeeman effect can be used to determine the _______ our Sun and other stars
a. rotation speed of b. mass of c. color of d. magnetic field on e. radial velocity toward or away from
Newton's 3rd Law of Motion states that
A) action and reaction are equal and opposite B) force equals mass times acceleration C) an object moves at a constant velocity unless a force acts D) the force of gravity decreases with increasing distance
An asteroid approaches Earth so that when it is very far away it is traveling with a speed of 6500 m/s along a line that would miss the center of Earth by 8,500,000 m
Because of the gravitational attraction of Earth, it departs from this straight line and curves towards Earth, colliding with it. In what direction, below the local horizontal, is the asteroid traveling when it hits Earth? The mass of Earth is 5.97 × 1024 kg and G = 6.67 x 10-11 N•m2/kg2. A) 48° B) 58° C) 68° D) 78° E) 88°
Main sequence stars are all about the same radius as the Sun
Indicate whether the statement is true or false