Two slits separated by 0.10 mm are illuminated with green light (? = 540 nm). Calculate the distance (in cm) from the central bright-region to the fifth bright band if the screen is 1.0 m away.
A. 2.3
B. 2.5
C. 2.7
D. 2.1
E. 2.0
Answer: C
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A 5.0-g particle moving 60 m/s collides with a 2.0-g particle initially at rest. After the collision each of the particles has a velocity that is directed 30° from the original direction of motion of the 5.0-g particle. What is the speed of the 2.0-g particle after the collision?
a. 72 m/s b. 87 m/s c. 79 m/s d. 94 m/s e. 67 m/s
We can study how galaxies evolve because ________
A) galaxies are transparent to visible light B) we can watch as they interact in real time C) the farther away we look, the further back in time we see D) we are really smart astronomers
The absolute temperature of an ideal gas is directly proportional to which of the following quantities?
A) the average speed of its molecules B) the average momentum of its molecules C) the average kinetic energy of its molecules D) the mass of its molecules E) It is proportional to all of the above quantities.
The energy attributed to an object by virtue of its motion is known as
A) kinetic energy. B) potential energy. C) radiative energy. D) mass-energy.