Gas falling into a black hole becomes ____.
a. hot, due to an increase in speed and molecular collisions
b. hot, due to radiation from the black hole
c. compacted into solid matter by tidal forces
d. cool, due tothe loss of gravitational energy.
e. cool, due tothe emission of infrared photons
a
You might also like to view...
Which of Bohr's assumptions in creating the "Bohr atom" was revolutionary (unclassical)?
What will be an ideal response?
An oil film floats on a water surface. The indices of refraction for water and oil, respectively, are 1.333 and 1.466 . If a ray of light is incident on the air-to-oil surface at an angle of 41.9° with the normal, what is the incident angle at the oil-to-water surface?
a. 30.1° b. 27.1° c. 37.4° d. 41.9° e. 33.5°
Which internal heat source still generates heat within the terrestrial worlds today?
A) heat from radioactive decay B) heat of accretion C) heat from differentiation D) heat from convection
A zoom lens for a camera is adjusted to change its focal length from 38 mm to 304 mm. If the same amount of light is to be admitted to the lens in both cases, what is the final f-number if the original f-number was f/2.0?
What will be an ideal response?