Physics Ch. 12-14 Flashcards
What did Einstein discover?
- Space is not an empty vacuum, it is a fabric, the heavier an object, the more it warps
- Every object attracts every other object; the sun attracts plants, and planets attract the sun
What did Newton discover?
- Why the apple didn’t fall sideways as the moon appeared to
- Calculated how fast the moon is ‘falling’
-The moon has speed, but there is also something pulling it down
Newton’s Law:
all objects in the universe have a gravitational attraction toward each other. The distance/mass between them controls the strength of that attraction.
F= G x (M1M2/D2)
What is the gravitational constant?
6.67 x 10^-11
Inverse square Law:
How to solve for gravity w/o the formula; if you get far away from something, the gravitational force of the object gets reduced by the inverse of the square
Perturbations:
When objects are disturbed by other objects in space. The path is affected by the gravitational pull of the other object
What planet was discovered by perturbations?
Neptune
Infinite (_________) vs. Oscillating (_________)
constant and not expanding
currently expanding but one day the universe will collapse
weightlessness is when there is no _______________
support force
How long is a tide cycle?
24 hrs and 50 min
Spring tide
Really high high tide and really low low tide
Neap Tide
High low tide and low high tide
Measurables of a black hole are
Mass, angular momentum, charge
Supermassive black holes:
Intermediate black holes:
Primordial black holes:
started in really early galaxy formations
two stars collide
Happened at the earliest stages of the formation of the universe
Satellite def.
Anything that is in orbit around something else
Speed of earths curve?
8000 m the earth drops 5 m
Takes ____ minutes to circle the globe
90
The bigger the planet the ______ the escape speedd
bigger
What is the escape speed of earth?
11.2 km per second
