Why is the core hot?

A. from both the decay of radioactive atoms and the leftover heat
B. from heat left over from the planet's birth
C. The high pressure in the core drives the temperature higher.
D. from the steady decay of radioactive atoms in the rock
E. None of these choices are correct.


Answer: A

Physics & Space Science

You might also like to view...

If two identical planets, each with surface gravity g and volume V, coalesce into one planet with volume 2V, the surface gravity of the new planet is 2g

1.True 2.False

Physics & Space Science

Why is a brown dwarf not considered a star?

What will be an ideal response?

Physics & Space Science

The speed v of an object falling with a constant acceleration g can be expressed in terms of g and the distance traveled from the point of release, h, as v = agbhc, where a, b, and c, are dimensionless constants. What must be the values of b and c?

What will be an ideal response?

Physics & Space Science

A sound wave in air has a frequency of 515 Hz and a wavelength of 0.68 m. What is the air temperature?

a. –18°C c. 15°C b. 32°C d. 27°C

Physics & Space Science