Author Question: How does the Space Shuttle take off? A) Its rocket engines push against the launch pad propelling ... (Read 79 times)

Ebrown · **on:** Jul 27, 2018

How does the Space Shuttle take off?

A) Its rocket engines push against the launch pad propelling the shuttle upwards.
B) It converts mass-energy to kinetic energy.
C) It achieves lift from its wings in the same way that airplanes do.
D) Hot gas shoots out from the rocket and, by conservation of momentum, the shuttle moves in the opposite direction.
E) The hot rocket exhaust expands the air beneath the shuttle, propelling it forward.

Question 2

In a photo like the Hubble Deep Field (Figure 20.1 in your textbook), we see galaxies in many different stages of their lives. In general, which galaxies are seen in the earliest (youngest) stages of their lives?

A) the galaxies that are farthest away
B) the galaxies that have the most hot, young O and B stars
C) the galaxies that are the reddest in color
D) the galaxies that are nearest to us