sorry i was typing this quite quickly, the question was given to me by my physsics teacher to remember so no diagram but it says thaat there is a mining project on an alien planet to the center of the planet and the alien hyperthetically falls down the mineshaft to the bottom of the shaft (The...
Homework Statement
What is the ratio between times for the aliens to hit the floor. you have two spheres of equal density throughout. One has a radius R and the other 1/2R. An alien falls down one and takes time T, the other it falls down in time t. In the second on, time t, half of the mass...
Homework Statement
An object is moved with a speed of 2m/s on one side of a 1m table to the other, it stops right at the other and of the table without falling off. Does it have wheels or not?
Homework Equations
The teacher gave this just to me and said we havnt learned about it yet...
the moon doesn't just orbit the earth, as the center of gravity is where they orbit round, the COG is between the Earth and the moon in space somewhere, the moon doesn't fly right down to the Earth as it's velocity counteracts the gravitational field, keeping it iin orbit but not colliding into...
good point, what if the big bang is the last turtle in the list, maybe we have no concept of previous turtles as time didnt exist. All I am trying to give is a reason for the big bang :D
1) in quantum mechanics, a point particle has a property known as duality, which means in some experiments it acts as a wave, (If you look up the double slit experiment the interference pattern shows light acting as a wave as the peaks of one wave reacts negatively for the troughs of the other...
the photons don't exactly push back the photons, but the photon will contain energy which will be absorbed by the electron, in effect giving it its energy, this energy will make the electron vibrate more and possibly even bouncing it up to a higher energy level, if the photon contains enough...
When you use the example of a 2 dimensional world floating in a 3 dimensional medium, the 3rd dimension is of space and so does not explain the question :D
Don't think of it as a "slope", as that infers that possibly a rolling, undulating almost hill like space-time makes the Multi-dimensional attractive force. A slope refers to a 2 dimensional curvature that always makes an object fall downwards. Space-time is warped by the presents of mass, which...
gravity affects all objects even those particles without mass ( for example, the photon) we can see this in gravitational lensing. When there is an eclipse of the sun, we can see that photons (Light) are attracted by the suns gravitational field :D
im not sure, if you use F=MA, then the force you need is the acceleration that you want 90 times 2m/s, this should give you the force that you need to apply to the rocket to get a 90KG rocket to fly at 2m/s.
The use of the word "downward" has no relevance here as we are talking about an overall 3D curvature, something that we can't imagine, it doesn't fall downwards it falls in all 3 dimensions :D