Recent content by Joe436

OK, I think there is some confusion in what I am asking. I step on a scale in my bathroom and it says I weigh 175 lbs or using the metric system 79.5 kg. If I'm on mars, venus, pluto, etc... my weight will be different. But my mass, which I believe is measured in KG is always the same no...

But your weight will change if you're on the moon, mars, etc... Your mass is always the same regardles of where you are.

Can I use lbs for F or do I have to use kgs? Thanks

Hi, Can someone tell me how to find out the mass of a person. If someone weighs 150 lbs (on Earth) what is their mass? Any chance someone can point me to a web page that will convert weight to mass for me. Thanks, Joe

Cool. Thanks for explaining this to me. Wasn't sure if this site was meant for people like me who are just curious about physics. Hope I didn't annoy you. Thanks again, Joe

So a black hole is an object with a "big" mass and compressed to a small enough size allowing you to get closer to it. And if you get close enough, you or anything else including light couldn't escape it's gravitational force? Thanks, Joe

I do remember that formula now. I think I'm beginning to understand this now. Thanks, Joe

OK, I think I got it with what you said above and the two posts from berkeman and jgens. So basically, star (or our sun if it had enough fuel) collapses and it compresses into a smaller object. Which allows you to get closer to it's entire mass. The closer you get to it the stronger the...

This kind of contradicts what I was taught in high school physics (granted they really didn't go into black holes). That the size of the object doesn't matter, just the mass. You could have two objects that are the same size but a different mass. The greater the mass the greater the gravity...

Hi, The way I understand it (and correct me if I'm wrong). Sometimes a star collapses on itself and forms a black hole. Floating around in space getting bigger as it pulls in whatever gets too close to esacpe it's gravitational field. What I don't understand is why a black hole is so...