Nebula that tend to be bluish in color are the
A) emission nebula.
B) reflection nebula.
C) dark nebula.
D) cyan nebula.
Answer: B
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Sometimes the outermost layers of a pulsating variable star are too opaque to allow much energy to escape to space. What happens to the star as a consequence of this?
A) Pressure builds up, causing the outer layers to expand until they are transparent enough for the energy to escape. B) The star builds up so much energy that it explodes as a supernova. C) The entire star heats up dramatically, causing the rate of fusion to increase in the core. D) The star becomes a red giant.
The solar system contains the Sun, eight major bodies called planets, and at least thousands of smaller bodies
Indicate whether the statement is true or false
Steam will burn the skin more severely than boiling water because of water's relatively large
A) emmisivity. B) specific heat. C) conductivity. D) latent heat. E) compressibility.
A light beam having a wavelength of 470 nm in air is directed into glycerine at an angle of 75.0° with the normal in air. Glycerine has a refractive index of 1.47. (c = 3.0 × 108 m/s)
(a) What are the frequency and wavelength of the light in the glycerine? (b) What angle does the light beam make with the normal in the glycerine?