Sunday
April 20, 2014

Posts by Sev


Total # Posts: 9

algebra
please help me for this problem.im not good in math.the challenge involves in dealing with the owner is to use a 20 meter fencing material to build a pig pen so that the owner will not be buying any additional materials considering also that one side of the pen is the outside ...

Physics
Jo student undertakes a unique experiment with his calculator. He goes to the school roof that is 18.0 m above the ground. He throws the poor calculator upward with a velocity of 42 m/s. Assume that the calculator goes straight up and just misses the roof on its way to the gro...

Physics
Calculate the average speed of the car in km/h, it can accelerate from 96.56 km/hr in 4.3 seconds. Distance is not provided

physics
A boat sails 251 km to the East and then 534 km to the North. What is the distance of the boat from its starting point?

physics
A person walks 10 m in the + direction, 32 m in the - direction. What is the displacement of that person from their starting point.

Chemistry
Just wondering, why do you square the numerators?

Chemistry
An 0.0284 aqueous solution of lactic acid is found to be 6.7% ionized. Determine Ka for lactic acid. HC3H5O3 + H2O <-- --> H3O^+ + C3H5O3^- Ka =? Thanks.

Chemistry
The much-abused drug cocaine is an alkaloid. Alkaloids are noted for their bitter taste, an indication their basic properties. Cocaine C17H21O4N, is soluble in water the the extent of 0.17g/100 mL solution, and a saturated solution has a PH = 10.08. What is the value of Kb for...

chemistry, freezing point depression
Hey guys I did a lab and I have to answer the questions relating to the lab. I did question 1 & 2, can someone check if they are correct, and question 3 I don't know how to do it. 1. Calculation to Determine the molecular weight of unknown substance Mass of unknown used: 2...

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