# Yasha

Most popular questions and responses by Yasha
1. ## chemistry

If all the energy obtained from burning 1.23 pounds of propane (fuel value is 11.09 kcal/g) is used to heat 125.0 kg of water at an initial temperature of 21.8 °C, what is the final temperature? Hint: The heat, q, released by burning propane is absorbed

2. ## Chemistry

At constant pressure, which of these systems do work on the surroundings? Check all that apply. A(s) + 2B(g) ---> C(g) 2A(g) + B(g) ---> 4C(g) A(g) + 2B(g) ---> 2C(g) A(s) + B(s) ---> C(g)

3. ## calculus

Interference Two identical tuning forks are struck, one a fraction of a second after the other. The sounds produced are modeled by f1(t) = C sin(wt) and f2(t) = C sin(wt + Alpha). The two sound waves interfere to produce a single sound modeled by the sum

4. ## PLZ ANSWER THIS!!!! QUICK

Suppose the lengths of the four side of a quadrilateral are represented by the expressions 3a, a+2, 2a-1, and 3a+6. write the sum of the lenghts (the perimeter), and then simplify.

5. ## HELP WITH ALGEBRA!!!!!!!

Suppose the lengths of the four side of a quadrilateral are represented by the expressions 3a, a+2, 2a-1, and 3a+6. write the sum of the lenghts (the perimeter), and then simplify.

6. ## algebra

Suppose the lengths of the four side of a quadrilateral are represented by the expressions 3a, a+2, 2a-1, and 3a+6. write the sum of the lenghts (the perimeter), and then simplify.

7. ## algebra

use factoring and the zero-product property to solve 4a^2-11a+6=0 9r^2-30r+21=-4

8. ## MATH

how do u find the area of a quadrilateral?

1. ## Chemistry

Thank you so very much~!

posted on March 23, 2012
2. ## probability

3 out of 11

posted on October 16, 2008
3. ## Biology

fungi

posted on October 16, 2008
4. ## Algebra 1

subtract 8 from 3 then add two to that answerthen divide by 3. then u will get x

posted on October 16, 2008
5. ## english

No

posted on October 16, 2008