Author Question: How can we determine an asteroid's reflectivity? A) by determining its mass B) by comparing its ... (Read 73 times)

09madisonrousseau09 · **on:** Jul 27, 2018

How can we determine an asteroid's reflectivity?

A) by determining its mass
B) by comparing its infrared thermal emission to its visible-light reflection
C) by seeing how dark or light it looks in telescopic images
D) by determining how far from the Sun it is
E) by determining its size

Question 2

When is thermal energy trapped in the dense center of a cloud?

A) when the gravity becomes so strong that photons cannot escape
B) when excited molecules collide with other molecules before they can release a photon
C) when the cloud becomes so hot and dense that nuclear fusion begins
D) when magnetic fields trap the radiation
E) when the cloud cools down so much that less light escapes than is produced by contraction