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    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...
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    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...
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    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.
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    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...
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    Car & Gasoline

    1. Homework Statement How does the amount of work done on an automobile by its engine relate to the energy content of the gasoline ? 2. Homework Equations How does the amount of work done on an automobile by its engine relate to the energy content of the gasoline ? 3. The Attempt...
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    Test tomorrow need help

    I'm taking chemistry in my sophmore year, I need help with writing names or chemical formulas, to be honest I don't know anything whatsoever. For example: HOW can I possibly know that Calcium Selenide would be CaSe in chemical formula Or that (NH4)2SO4 is ammonium sulfate ?????????? I...
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    Need help with homework

    Okay here is my question.:shy: If Total Energy should be constant, because the loss in Potention energy should equal a gain in Kinetic Energy, where does the missing total energy go to ? Here is my data; TOTAL ENERGY: MISSING ENERGY: .1254...
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