Exam (elaborations)
the equivalence principle, general relativity Questions with Solutions
- Course
- Institution
the equivalence principle, general relativity
[Show more]
Content preview
the equivalence principle, generalrelativity
If you travelled to the center of our galaxy and back at 99.99999999999% of the speed
of light, - answer you would age about 8 days, but Earth would age 50,000 years!
(Because time goes more slowly)
the four fundamental forces of nature - answer Gravity
Electromagnetism
Strong nuclear force
Weak nuclear force
1. Strong nuclear force - answerStrength:
1
Range:
10^-15
Function:
Holds atomic nuclei together
2. electromagnetism - answerany force you feel besides gravity
Strength:
1/137
Range:
Infinite
Function
Makes atoms cling to each other
3. Weak nuclear force - answerStrength:
10^-5
Range:
10^-17 m
, Function:
Breaks atoms apart
4. gravity - answerStrength
10^-39
Range:
Infinite
Function:
Makes masses attract one another
are Stars on one side of our galaxy affected by the gravitational pull of stars on the
other side? - answeryes
In a universe which is empty except for you and a baseball, and you throw a baseball,
ignoring the effect of gravity what will happen? - answerthe baseball will move away
from you at constant speed
When the baseball loses contact with your hand - answerit stops accelerating (newtons
second law)
what will happen if you throw the ball? - answerit will cause you to move in the opposite
direction but slower (third law)
newton's first law - answerObjects move with constant speed and direction unless acted
upon by an external force
newton's second law - answerforce=mass x acceleration
acceleration= force/mass
Newton's third law - answerIf one body exerts a force on another, the other body will
exert a force of equal strength but opposite direction
What keeps the moon in orbit around the earth? - answerEarth is pulling on the moon,
and the moon equally pulls on the earth
newton's law of gravity - answerF g = G x M x m / r^2
This applies for every pair of objects in the universe
The force is equal but the effect depends on the mass (bigger mass, more gravity)
From 1687 until 1916, newton's description of gravity held sway
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Dreamer252. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now