Motions in the universe

Question 1

What is the formula for orbital speed?

Answer 1

orbital speed= 2(pi) x orbital radius/ time period

Question 2

What is the definition of a universe?

Answer 2

• -> LARGE Collection

- ->of bill. galax

Question 3

What is the definition of a galaxy?

Answer 3

• ->Large Collection

- -> of bill. of stars

Question 4

What creates a gravitational field?

Answer 4

–>objects w/ mass

Question 5

What does gravitational force depend on?

Answer 5

• -> Mass

- ->Distance

Question 6

What is the formula for weight?

Answer 6

–> weight= mass x g

Question 7

What does gravitational field strength cause?

Answer 7

–>orbits

Question 8

What is our solar system?

Answer 8

–>The Milky Way Galaxy

Question 9

What does gravitational field strength depend on?

Answer 9

• ->mass

- ->Radius (distance)

Question 10

Explain the relationship between the gravitational field strength of the planet and its radius?

Answer 10

• ->larger radius=

- ->smaller gfs at surf.

Question 11

Describe the orbit of moons

Answer 11

• ->planets

- -> ellip.

Question 12

Describe the orbits of planets

Answer 12

• ->stars

- -> circular

Question 13

Describe the orbits of comets

Answer 13

• ->stars

- ->Highly ellip.