Thread: gravity question

I was wondering...

If we have two objects of the same mass... but one was hotter than the other... does the hotter object have more gravity?

Originally Posted by JFalz1024

If we have two objects of the same mass... but one was hotter than the other... does the hotter object have more gravity?

I would guess that if you started with two objects of the same mass, and heated one up, it would have more mass than the other one. But it may be more complicated than that, I'm not sure. How big are these objects?

Originally Posted by grapes

I would guess that if you started with two objects of the same mass, and heated one up, it would have more mass than the other one. But it may be more complicated than that, I'm not sure. How big are these objects?

I'm primarily edging this question towards matter on the macroscopic scale.

Yes, it is as grapes said. But the difference is very slight.

Thaaaank ya gentlemen.

e=mc^2
so there is an equivalent mass for energy ... A laser has a gravitational field.

I would assume it depends on HOW you heated the mass ... if you applied mass from an external source like a laser then in theory that mass would now have more energy ( mass + external energy ) in its system .... as it cools and releases energy into outer space it would have less energy ...

Its gravitational field is relative to the total amount of energy in the system.

What if we have two objects of different dimensions but the same mass. Does that impact space/time differently?

Originally Posted by JFalz1024

What if we have two objects of different dimensions but the same mass. Does that impact space/time differently?

Of course. The gravitational field for the earth plus the mass of the moon would be a lot different than the earth and moon system now. That's Newtonian, even.

Originally Posted by grapes

Of course. The gravitational field for the earth plus the mass of the moon would be a lot different than the earth and moon system now. That's Newtonian, even.

Although I would add that the differences are most evident when you are close. When you are far away, they're almost the same.

In this case, anything less than 400,000 kilometers is close!