White-hot sparks from a fireworks sparkler that strike your skin don't cause injury because
A) they have a low temperature.
B) the energy per molecule is very low.
C) the energy per molecule is high, but the total energy transferred is small.
Answer: C
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Streaks of light made when small debris hits our atmosphere are called
A) meteorites. B) meteors. C) asteroids. D) meteoroids. E) comets.
We know that the central object in a planetary nebula has a surface temperature of at least ____ because the nebula contains large amounts of ionized hydrogen
a. 50 K b. 100 K c. 500 K d. 5,000 K e. 25,000 K
A car is driven 1 200 m north at 20.0 m/s and then driven 1 600 m east at 25.0 m/s. What is the magnitude of the average velocity for this trip?
a. 16.1 m/s b. 22.6 m/s c. 31.3 m/s d. 11.3 m/s e. 62.2 m/s
In a single-slit diffraction experiment, the central maximum is broadened if the wavelength of light is increased
Indicate whether the statement is true or false