# Gravity has to have an effect on time,when gravity can curve space ,it

1. Feb 22, 2009

### monty37

gravity has to have an effect on time,when gravity can curve space ,it also
has to influence time,time that has remained unaffected ,or has been continously going forward all these years,from the time humans existed .

gravity has to retard time,even though time could be a 4 dimensional aspect.

2. Feb 22, 2009

### Staff: Mentor

Re: time

I don't see a question anywhere there, but yes, there is gravitational time dilation. Note, though, it is only calculated with respect to something else (say, a space ship in orbit around earth) and for the mass of the earth it isn't very much.

3. Feb 23, 2009

### monty37

Re: time

why is not very much for mass of earth?

4. Feb 23, 2009

### Staff: Mentor

Re: time

Earth's mass just isn't enough to cause a big distortion. Consider that sun has more than 300,000 times the mass of the earth and is a small to medium-sized star.

5. Feb 25, 2009

Re: time

Something that could cause a time dilation would have to be an object like a black hole that exerts a very strong gravitational field

6. Feb 26, 2009

### monty37

Re: time

will we consider time a scalar or vector quantity,since time does have a direction
it moves forward ,it has to be a vector . time has been looked as a scalar qty in many places.

7. Feb 26, 2009

### monty37

Re: time

why is it not possible to determine the volume of the universe using integral calculus
taking limits as infinity,roughly what we see around us ?

8. Feb 26, 2009

Re: time

We don't exactly know the specifics of how time works with cercumstances other than what occur naturaly so its possible that it could be one or the other or both.

9. Mar 2, 2009

### monty37

Re: time

a black hole has to be a perfect black body,as a perfect black
body emits or absorbs all radiations,a black hole does.