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S1 W3 Astronomy FC - Vectors, Laws of motion, Sig Figs

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Last updated 5 months ago
19 questions
Note from the author:
Kepler's laws and milankovitch cycles
Kepler's laws and milankovitch cycles
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Question 1
1.

Review from last week: Consider a comet, with a far more eccentric orbit than a planet like earth. Can you explain in terms of Kepler's law why the comet must move much slower when it is at the outer edge of the solar system than when it is close to the earth?

Question 2
2.

The center of the sun is always where in a planet's orbit?

Question 3
3.

There are several ways to write vectors. which of the following will not work for this vector

Question 4
4.

A vector requires

Question 5
5.

One of the main differences between the speed and the velocity is that speed is a scalar (magnitude, no direction) and velocity is a vector (magnitude and direction). So if a car is moving at a constant miles/hour but is traveling on this road

you would say that car has

Question 6
6.

A car moving north with constant speed has

Question 7
7.

A planet moving in a circular orbit at constant speed as

Question 8
8.

Step 1: read chapter 2.1-2.4 in your book. Note any questions you have here.

Question 9
9.

Which of the following is newtons first law of motion

Question 10
10.

So if I am floating in space and I throw a ball what will happen

Question 11
11.

Newton's second law is Force = Mass x acceleration. What is acceleration?

Question 12
12.

the force of gravity close to a large star is going to be

Question 13
13.

Consider a comet, with a far more eccentric orbit than a planet like earth.

You already explained above why Kepler's law says it moves faster close to the sun and slower away from the sun. Can you explain in terms of Newton's law of universal gravitation why the comet must move much slower when it is at the outer edge of the solar system than when it is close to the sun?

Question 14
14.

Explain newton's third law in your own words.

Question 15
15.

A cinder block can be weightless in space. Does this mean it does not have mass?

Question 16
16.

You are floating in space again, throwing a ball. what happens to you when you throw the ball? how would that change if the ball is significantly heavier (assume you throw both balls at the same speed?)

Question 17
17.

Your measurements for your parallax lab asked you to calculate to the nearest tenth of a degree. how many significant figures would that be?

Question 18
18.

0.0003400 has four significant figures. Can you explain why two of the zeros counted as sig figs, and four of them did not?

Question 19
19.
  • how to find significant digits
  • what is the purpose of significant digits
  • what is a vector
  • what is a scalar
  • the difference between velocity and speed
  • newtons first law
  • newtons second law
  • newtons third law
  • I've got this
  • I'm fuzzy
  • so confused