Thursday

October 23, 2014

October 23, 2014

Total # Posts: 213

**maths, variations**

i'm not sure how this question works the number of hours (h) taken to paint a picture is inversely proportional to th number of pupils (p) painting it. it takes 4 pupils 3 hours to finish painting it assuming all pupils work at the same rate. a) find an equation connecting...
*December 18, 2007*

**maths, variations checking!**

question: given that y is inversely proportional to (x-1), A) express y in terms of x and a constant k b) give that y=5 when x=3, find x when y=25 answer: A)y=-k(x-1) y=-kx+k B)y=5, x=3, k(constant)=3x5 k=15 25=-15x+15 10=-15x x=-10/15 is this correct? i'm not too sure ...
*December 18, 2007*

**maths, variations**

question: if y is proportional to x, and that y=6 when x=12, (A)express y in terms of x, (B)and find to value of x when y=12. answer: (A) x=y/3 (B) x=4 is what i did correct? i would appreciate your help!
*December 18, 2007*

**Physics**

okay so this is what i did to find the work done by overcoming friction: Ff = .9 N d = .91 m (Ff x d = Wf --> .9 x .91 = .82 J) hmm okay so how would you find the work done by friction using that calculation that you just said (change in total energy = work done by friction...
*December 16, 2007*

**Physics**

One way that I found was knowing the force overcoming friction (Ff). so the equation to fin dthe work would be Wf = Ff * d.. as you said above (force*distance). But what other calculation would you use to find the wasted work without knowing the friction force?
*December 16, 2007*

**Physics**

There are two ways to find how much work is done voercoming friction. One method entails knowing the force overcoming friction. What other calculation could be done to find this wasted work?
*December 16, 2007*

**math**

yes
*October 23, 2007*

**Science**

sound
*October 17, 2007*

**science**

C) Water may evaporate rapidly
*October 6, 2007*

**chemistry**

i have to decide which one is more polar by using an arrow. 1. N-H 2. O-F 3.C-O Look up the electronegativity on a chart and take the difference between the two elements. The larger the difference the more polar.
*April 8, 2007*

**Geometery**

How do I solve this? On my assignment it says find the area inside the square, but outside the circle, given that the radius of the circle is 2 ft. Use 3.14 for ^ I have a picture of a square with a circle in the square, with a base 6 ft. and height 6 ft. Here are the choices ...
*March 1, 2007*

**word unscramble**

lorco tyssme
*September 28, 2006*

**Science (Chemistry!)**

I just do not understand ANYTHING about multiplying/dividing/adding/subtracting significant figures! For example, the problem is: Solve the following to the correct number of significant figures: (5.039)(0.0074) What am I supposed to do? Just multiply the numbers? What does ...
*August 31, 2006*