# Recent content by ReoFonzo

1. ### Question about momentum ?

Rolling friction ? Never heard of ?
2. ### Question about momentum ?

Oh yeah, my bad... velocity times mass... I always mix up with impulse lol :S, but yeah I guess friction is part of the experiment ? However... when you take the bucket of sand off, the friction stays the same ?
3. ### Question about momentum ?

1. Homework Statement Ok so my teacher used this example in class, he had this flat wheeled cart rolling on the floor. The object was to release a bucket of sand on top of the flat cart to see if the cart would slow down or accelerate. Easily, all of us the students predicted that the cart...
4. ### Need help with isotopes: Chemistry!

how do i find calculate the average atomic mass for sulfur?
5. ### Need help with isotopes: Chemistry!

1. Homework Statement Sulfur has 4 naturally occurring isotopes: Sulfur-32 Abundance = 95.0% Sulfur-33 Abundance = 0.76% Sulfur-34 Abundance = 4.22% Sulfur-36 Abundance = 0.014% Sulfur's symbol is S, it has 16 electrons and a mass of 32.06g 2. Homework Equations I'm actually...
6. ### Chemistry Chemistry regarding moles!

1. Homework Statement How many moles is 34.8 of sodium hypochlorite ? 2. Homework Equations 34.8g (1mol/____g) = ______mol 3. The Attempt at a Solution 34.8g (1mol/58.44g) = 2033.712mol Not quite sure if this is how things work, hopefully you can give me a few hints.
7. ### Speed problem

Thanks a lot guys!
8. ### Speed problem

I have an awnser sheet and it says 2m/s... I'm supposed to find what force pushed the cart above the second hill which I assume is kinetic energy but I have no mass wich I don't understand...
9. ### Speed problem

1. Homework Statement I have to find the speed needed to push a cart on top of a hill and I only have the height as a number. 2. Homework Equations A boy places his matchbox car at the top of the track he has set up with his brother. If the track starts atop the 55 cm toy box, descends...
10. ### Need help with homework

1) Slower, because the water makes it hard to accelerate which I don't know how to explain 2) The car tire that is properly inflated because... AIR!
11. ### Car & Gasoline

To move, or for transportation ?
12. ### Need help with homework

1)Well depending on steel's density, it would either find itself at the botom of water or float to the top without even following the pattern 2)Friction ?
13. ### Car & Gasoline

Heat.. nuclear.. electric ??
14. ### Need help with homework

1) No, that's not what I'm talking about. What else is different about the moon, other than the 1/6 gravity? Its lighter 2) No, assume that they both have enough friction on the ramp so that they do not slip. What is the main difference between steel and rubber (other than mass density)...
15. ### Test tomorrow need help

Thanks guys, I failed the test...lol :S