Unit 2 Practice Questions

Question 1

How far up are geostationary orbit

Answer 1

~35000 km above earths

Equator

Question 2

3 gases to be used in ballons

Answer 2

Hot Air: limited lift, less stable due to temperature

Hydrogen: a large amount of lift, highly flammable, dangerous, and risky

Helium: safe, but expensive

Question 3

Geostationary vs Geosynchronous

Answer 3

geostationary: where the satellite has an orbital period that matches Earth rotation and stays above the equator

Geosynchronous: is at an inclined/ angle orbit causing the satellite to drift north and south over the equator

Question 4

How to get inverse of mass ratio

Answer 4

1/(mass ratio)

Question 5

A typical rocket exhaust speed (from chemical rocket propellants) is

Answer 5

2 km/s

Question 6

In general, the final rocket speed that can be expected for a 2 stage rocket versos a single-stage rocket

Answer 6

improves by about 50%.

Question 7

first liquid fueled rocket flight

Answer 7

Robert Goddard

1920s

Question 8

What would be the best summary of the advancement that took place for spaceflight technology during the 20th century?

Answer 8

Humanity went from the development of liquid fueled rocket propulsion to using such technology to place satellites in orbit around the Earth.

Question 9

In what decade did a rocket travel higher than the Karman Line

Answer 9

1940s