Total # Posts: 155
16. Vector A has a magnitude of 3 in the leftward direction and B has a magnitude of 5 in the rightward direction. What is the value of 2A B? You can also answer other types of problems using vectors. Try this one: Two forces are pushing on an object, one at 12 lbs of ...
December 6, 2011
A plane is heading west at 200 mph. The wind is blowing S30°W at 25 mph. 1. What is the ground speed of the plane? 2. When you solve the triangle, what is the smallest angle? 3. What is the largest angle of the triangle? 4. What is the remaining angle? 5. What is the ...
December 6, 2011
2. A public light utitlity company bills a unit of electricity usage in KWH. In its new billing policy, domestic usage, Rate 15, will have a monthly rate of $ 12.20 per unit for the first 100 KWH; $ 18.25 per unit for the next 700 KWH and $ 42.10 per unit for the each ...
August 28, 2011
With what minimum speed must you toss a 130 g ball straight up to hit the 12 m-high roof of the gymnasium if you release the ball 1.3 m above the ground? I already figured out the minimum speed, 14m/s I'm confused on the next part With what speed does the ball hit the ...
March 27, 2011
A sample of a hydrate of CuSO4 with a mass of 250 grams was heated until all the water was removed. The sample was then weighed and found to have a mass of 160 grams. What is the formula for the hydrate? CuSO4 * 10 H2O CuSO4 * 7 H2O CuSO4 * 5 H2O CuSO4 * 2 H2O CuSO4 * H2O
December 27, 2010
An analysis of an unknown compound found it contained 40 g potassium, 52 g chromium and 56 g of oxygen. a) What is the empirical formula for this compound? Show the work you did to determine the formula. b) What type of compound is it, ionic, covalent or a combination of both...
December 14, 2010
Which of the following reactions needs to be reversed to solve for the Heat of Neutralization between Hydrochloric Acid and Ammonia? Acetic Acid + Sodium Hydroxide Hydrochloric Acid + Sodium Hydroxide Acetic Acid + Ammonia
March 29, 2010
Use place value to solve. There are 75 children in the concert. there are 8 boxes of song books. there are 10 books in each box.Is there a book for each child in the concert? How do you know?
August 18, 2009
) In the example above, the Punnett Square represents a cross (mating) between a male (on the left side) with blood type AB, and a female, (top of square), with blood type A, genotype Ao.
April 8, 2008
I need some help with these questions. Why is there no electric field at the center of a charged spherical conductor? Does an electric field exist within a charged spherical conductor at points other than its center?
November 5, 2007
Remember, the treadmil is a machine. What is the inpput force exerted by the man inside the whill?? what is the output force exerted upon the water rising from the well? waht is the mechanical advantage of this machine? the man wt is 75kg. he raises his body 0.5 m the water wt...
November 1, 2007
Gravity accelerates objects downward at 9.8 m/s. How much downwards force does the man generate with each step he takes? how much work is performed when gravity pulls him down 0.5 m after each step?
November 1, 2007
I am reading "The crisis, No.1" now. What does this sentences mean "Mutual fear is the principal link in the chain of mutual hate, and woe be to that state that breaks the compact"? I really need help. Please tell me someone. "Mutual fear is the ...
October 17, 2006
Research Paper (Report)
How am I supposed to write very beginning of the essay? Generally, a thesis statement will appear in the introduction to the essay, which is the first paragraph or section of the essay introducing your topic. Aim for a clear, strong introduction that sets out what you're ...
September 22, 2006
Suppose you have an industry with 20 firms and the CR is 30%. How would you describe this industry?Suppose the demand for product rises and pushes up the price for the good. What long run adjustments would you expect following this change in demand? What des your adjustment ...
June 12, 2006