Which of the following cannot travel in a vacuum?
A) a light wave
B) a sound wave
C) a radio wave
D) all can
E) none can
Answer: B
You might also like to view...
A telescope that suffers from chromatic aberration and has a low light-gathering power is most likely a:
A) small diameter reflecting telescope. B) small diameter refracting telescope. C) large diameter refracting telescope. D) large diameter reflecting telescope.
The H? line has a wavelength of 434.0 nm when observed in the laboratory. If the H? line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star?
a. 346 km/s away from the observer b. 346 km/s toward the observer c. 1.3 × 10^8 m/s away from the observer d. 1.3 × 10^8 m/s toward the observer e. The radial velocity of the star cannot be determined from this information.
A blob of clay, mass M, is dropped onto a spring from a height h above the end of the spring. If the spring compresses an amount d as the blob comes to rest, what is the spring constant?
a. 
b. 
c. 
d. 
Energy and Momentum: A 0.32-kg ball is moving horizontally at 30 m/s just before suddenly bouncing off a wall Just after the bounce, it is moving horizontally at 25 m/s but in the opposite direction.(a) What is the magnitude of the change in momentum of the ball during the bounce?(b) What percentage of the ball's original kinetic energy was lost in the collision?
Fill in the blank(s) with the appropriate word(s).