# Questions Asked onFebruary 5, 2011

1. ## Chemistry--DR.BOB HELP!

If 1 volume of 0.1 KH2PO4 is mixed with 2 volumes of 0.1 OHEtNH2 (pka=9.44), what will be the pH of the mixture? I know I know: HH equation

2. ## Math

A number when divided by 14 or 13 leaves a remainder 3. Find the least possible value of that number?

3. ## Math

A number when divided by 14 or 15 leaves a remainder 3. Find the least possible value of that number?

4. ## Calculus

integrate t*(t^2 - 1)^(1/3) dt over (0,3) I substitute u = t^2 - 1 du = 2t dt which leads to integrate (1/2) u^(1/3) du over(-1,8) = (3/8) * u^(4/3) over (-1/8) = 3/8 * [8^(4/3) - (-1)^(4/3)] I would guess that (-1)^(4/3) is +1, since the cube root of -1

5. ## physics

A body pulled by a constant force accelerates from 10 cm/s to 35 cm/s in 3.5 s. A second force accelerates the same body from rest to 110 cm/s in 10.5 s. If the first force is known to be 5.0 N, that what is the second force?

6. ## physics

what sould be the angular speed with which the earth have to rotate on its axis so that a person on the equator would weight 3/5th as much as present..??

7. ## physics

The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." If the ball is kicked with an initial velocity of 24.2 m/s at an angle of 58.5° above the ground, what is the "hang time"?

22. ## science

can a bicycle have the same acceleration?how?

23. ## english

What can i say at the start and at the end of a recorded interview? i will be interviewing an agriculturist.

191. ## chemisty

A mixture contains only NaCl and Al2(SO4)3. A 1.76-g sample of the mixture is dissolved in water, and an excess of NaOH is added, producing a precipitate of Al(OH)3. The precipitate is filtered, dried, and weighed. The mass of the precipitate is 0.126 g.

192. ## College Chemistry2

A solutionof 2.50g of a compound having the empirical formula C7H6O2 in 25.0g of benzene is observed to freeze at 4.3 degree C.Calculate the molar mass of the solute and its Molecular formula

193. ## CSI Fema question

Is a separate incident command post a sepeerate General staffsection?