What best describes the speed of light waves in solids, liquids, and gases?
A. The speed is fastest in solids.
B. The speed is fastest in liquids.
C. The speed is fastest in gases.
D. The speed is the same in all matter.
Ans: D. The speed is the same in all matter.
You might also like to view...
A red car has a head-on collision with an approaching blue car with the same magnitude of momentum. A green car driving with the same momentum as the other cars collides with an enormously massive wall
Which of the three cars will experience the greatest impulse? A) red car B) blue car C) green car D) all the same
A stonecutter's chisel has an edge area of 0.7 cm2. If the chisel is struck with a force of 42 N, what is the pressure exerted on the stone?
A. 600 N/m2 B. 30,000 N/m2 C. 300,000 N/m2 D. 600,000 N/m2 E. 6000 N/m2
Combining two sounds of equal intensity will give a sound level 3 dB higher than the sound level due to just one of them
a. True b. False Indicate whether the statement is true or false
One 20-year-old twin brother takes a space trip with a speed of 0.80c for 30 years according to a clock on his spaceship. At the end of this trip, what are (a) his own age and (b) the age of his Earth-based twin brother?
A) (a) 20 y (b) 30 y B) (a) 30 y (b) 50 y C) (a) 50 y (b) 70 y D) (a) 70 y (b) 90 y