So if the interval between two events is spacelike, does that mean that the two events cannot effect each other? Does that also mean that no observer can observe both events?
Why is it that if an orbiting space station is observed to remain always vertically above the same point on Earth then the observer must be on the equator of Earth?
Now suppose we have two conductors A and B. A has a charge of +2 and B has a charge of +8. If we let the two conductors touch and then separate them, each will have a charge of +5. This is because charge is conserved and will flow between the two conductors until each have equal charges.
Ok...
I always understood entropy as the number of ways something can be arranged. Since the universe is expanding, there are constantly more ways in which things can be arranged, thus entropy must be increasing.
I am reading Taylor and Wheeler's Spacetime Physics. I am enjoying it a lot and find it extremely readable but I have a question regarding something. I am not sure how to determine the dimensions of a frame necessary for it to be called a free float frame. This is a general question I know.
To...
Why is current the same everywhere in a series circuit? If we have a series circuit with a 10 ohm resistor and a 15 ohm resistor, how is the current flowing through each resistor the same if they are resisting the flow of electrons to different degrees? How is the current in the wire which has...
Calculate the horizontal and vertical components of the velocity using trig.
In the x direction, where there is no acceleration, calculate how long it will take the ball to travel 7 m horizontally.
Then you can solve for how high the ball will be at this time, by using the equation
d =...
Homework Statement
Consider lowering and rising operators that we encountered in the harmonic oscillator problem.
1. Find the eigenvalues and eigenfunctions of the lowering operator.
2. Does the rising operator have normalizable eigenfunctions?Homework Equations
a-= 1/sqrt(2hmw) (ip + mwx)
a+...