I found this problem on a website. Is it right? (BTW, this is not homework, but I am just curious if I am thinking right about it.)
A marble with a mass of 2 grams moves to the left with a velocity of 2 m/s when it collides with a 3 gram marble moving in the opposite direction with a velocity...
Most of the gold is deep in the earth. If it was at Earth's center, would it weigh anything?
Most feathers might be closer to Earth's surface where g = 9.8m/s/s.
Roger, Eagle9. I have received and copy your transmission sent on July 7.
I think I am trying to catch up to you on this. Here is the way I see it so far, and I am trying to see it in terms of linear velocity.
At 62000 miles the counterweight is stationary above a point on the Earth's...
He might see you, but may not recognize you because you are not giving off as much light. To say that you see his flashlight or light from his flashlight does not mean that you see all of the light from his flashlight. To say that he sees you does not mean that he sees all of the light...
The mass of the box is m = Fw/g = 435n / 9.81 m/s2 = 44.3 kg.
Is it 40 degrees?
The parallel force Fp = Fw(sin40) = 280n
The net unbalanced force responsible for acceleration is F = m a = 44.3kg (0.25m/s/s) = 11.1n.
If Ff = |Fp| then the box would not accelerate.
The Force of friction, Ff...
I feel a bit uncomfortable being first to answer and admit that I really don't know.
But also my answer might help someone to add more info.in their reply.
Seems to me that the local air would warm. If you don't mind, let me work through it as follows.
For one thing, I think the initial...
While I am helping, I will be learning to use this forum's word processor. Sorry if I make a mistake because of that.
Let's try it on the Window's calculator as follows:
6.375 x 106 times 6.375 x 106 = 40640625000000 for the denominator. Did you get this? Save this in the memory.
I...
Where did my reply go? Maybe it will show up, but I'll say it again.
I scanned the posts and here is as far as I have gotten with this interesting question.
You all have made me think (correct me if I am wrong) that at first the bulbs close to the source would brighten and then dim as the...
There are stars between the stars. Why don't we see one bright light in the sky? I have heard it is because there is not enough light to fill the universe. I guess it could be explained like this: Two photons next to each other set out on their journey. Over millions of light years of...
Doesn't electron capture mean the electron is taken from an orbital and absorbed into the proton? It sounds like you are saying the hydrogen is formed by making an atom of a proton with an orbiting electron.
The average speed of sound in air at Earth's surface is around 330 meters per second. There is a very slim chance that enough air molecules or hydrogen molecules or some gas molecules would be lined up between here and the sun in just the right positions to propagate sound, but if they were...
I'm back to stick my edit right here in the beginning. When I replied to the original question I read all the posts that I saw. At that time I thought there was only one page of very few replies. I looked for other pages and didn't see any. So I posted the following which is my best guess...