# Rainie

Popular questions and responses by Rainie
1. ## Physics

What Precaution should be take in static and kinetic friction experiment?

2. ## Maths

3 inlet pipes A,B and C can be used to fill 1000m^3 water storage tank . When 3 pipes are in operation,the tank can be filled in 10hours .When only pipes A and B are used,the time increases to 20 hours. With pipe A and C, the tank can be filled in 12.5

3. ## Chemistry

I would really like to understand how to do these problems, because my exam is coming up in a few weeks. I still cannot comprehend how you can tell if a system is is positive or negative according to reaction. For #1, I presume it is E if it is spontaneous

4. ## Chemistry

I would really like to understand how to do these problems, because my exam is coming up in a few weeks. I still cannot comprehend how you can tell if a system is is positive or negative according to reaction. For #1, I presume it is E if it is spontaneous

5. ## Help Calc.!

original curve: 2y^3+6(x^2)y-12x^2+6y=1 dy/dx=(4x-2xy)/(x^2+y^2+1) a) write an equation of each horizontal tangent line to the curve b) the line through the origin with the slope .1 is tangent to the curve at P. Find x and y of point P.

6. ## Maths

A ball is dropped from a height of 80ft.The elasticity of this ball is such that it rebounds three-fourths of the distance it has fallen. How high does the ball rebound on the fifth bounce? Find a formula for the height the ball rebounds on the nth bounce?

7. ## Math

the length of rectangle is 5 cm more than twice its width. if the area is 52 cm^2,find its dimensions

8. ## Math

find the set of numbers each of which is 30 less than its own squares.

9. ## Mathematics

m=3/4 and passing through (40,35) y=_______

10. ## Maths

Find the terms as stated: (x-1/x)^6 constant term

11. ## English

Technology has brought about some changes in different areas of our lives , such as changes in transportation , medical sciences , communication as well as in the home . Discuss the impact of such changes on two areas , giving specific examples . Write

12. ## algebra

the set of months after june