Recent content by kerrwilk

Thanks a lot.

The Attempt at a Solution 4CaCO3+Al2(SiO3)3 -> CaO+4CO2+Al2O3 +3CaSiO3 Is this right? Also, how do I determine the physical state of each reactant and product? Do I use the solubility rules? Thanks for your help.

Homework Statement If limestone (calcium carbonate) and clay (assume aluminum silicate) are mixed together and heated then the result is cement. Cement is a mixture of calcium oxide, carbon dioxide, aluminum oxide, and calcium silicate. These bags can be purchased at any building supplies...

Homework Statement How many different paths will spell the word BINOMIAL in the following arrangement(moving diagonally downwards to the left or right)? ...B ...I I ..N N N O O O O .M M M ...I I ...A ...L L Homework Equations The Attempt at a Solution Starting from B using Pascal's Triangle...

Homework Statement A soccer coach organizing a field trip finds that 50 students have signed up. However, the bus has only 47 seats, so a few students will have to travel by car. The coach and one other coach must go on the bus. Explain two different methods for using combinations to find...

Thanks for your help.

Homework Statement There are 54 books in a book store: 28 are fiction, 21 are humour and 17 are children’s books. If 12 of the books are humourous fiction, 8 are children’s fiction, 3 are humourous fiction for children and 10 are serious non-fiction for adults, how many books are non-fiction...

Homework Statement Determine how many odd 4-digit numbers with all of the digits different can be made from the digits 0 to 7 if there must be a 4 in the number. Homework Equations The Attempt at a Solution First way (the "4" in the first spot) 1X6X5X4=120 2nd way ("4" in second...

Thanks for your help Delphi51. Is this how I would solve the problem? .5mv*2=.5kd*2+Fd .5(1)(20)*2=.5(35)d*2+(4)d 200=17.5d*2+4d 0=17.5d*2+4d- 200 d= 3.3m (quadratic formula) Thanks again.

A 1 kg puck slides at 20m/s along ice, then hits and compresses a spring with a constant of 35N/M. When it first hits the spring, the puck experiences a frictional force of 4.0 N opposing its motion. What is the maximum compression of the spring? Homework EquationsKE=1/2mv^2 The...

Thanks! That was a great explanation.

What does it mean if a line in R^3 is parallel to the xy-plane but not to any of the axes. I really don't know what this means in terms of how the parametric and symmetric equations of the line should look. Please help. Thanks.

Ronnin, Thanks so much for the help - this clarification of the wording fits with the formula in my text. One thing my text doesn't discuss in depth is finding "n" (number of payments) when the bond's purchase and maturity dates both occur on interest payment dates... Because this bond is...

Homework Statement A $500, 8% bond is purchased on Feb 1, 2004 to yield 10% compounded semiannually. The interest on the bond is payable on Feb 1 and Aug 1 each year. Find the purchase price if the bond is redeemable at face value on Feb 1, 2014. Homework Equations The Attempt at...