Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Astronomy Chapter 4

Astronomy

QuestionAnswer
speed how far an object will travel in a certain amount of time
velocity how far and in what direction an object will travel
acceleration change in velocity
acceleration of gravity acceleration of a falling object in m per sec
momentum product of mass times velocity
force change applied to an object's momentum
net force overall force acting on an object
angular momentum circular momentum
torque twisting force that can change an objects angular momentum
mass amount of matter
weight force that a scale measures
free-fall falling without resistance
weightlessness in a state of free-fall
Newton's First Law An object moves at constant velocity if there is no net force acting upon it
Newton's Second Law Force = mass x acceleration (F=ma)
Newton's Third Law For any action, there is an equal and opposite reaction
conservation of momentum total momentum of interacting objects cannot change
conservation of angular momentum as long as there is no external torque, the total angular momentum of interacting objects cannot change
conservation of energy energy cannot appear out of nowhere or disappear into nothing
kinetic energy energy of motion
radiative energy energy carried by light
potential energy stored energy
thermal energy collective kinetic energy moving within a substance
temperature measures average kinetic energy of particles
gravitational potential energy how much mass an object has and how far it can fall
mass-energy energy contained in mass itself (E=mc^2)
law of gravitation Fg = GM1M2/d^2
bound orbit ellipse
unbound orbits ellipse, parabola, hyperbola
gravitational encounter when two objects pass close enough to exchange orbital energy
escape velocity amount of energy needed by an object to clear a gravitational field of orbit
tidal force difference in gravitational forces that causes two tidal bulges
tidal friction tidal forces stretching the earth
synchronous rotation moon always shows the same face to Earth because of tidal friction
Created by: sgw005
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards