Which of the following is an electric charge?

a. north

b. south

c. neutral

d. unassigned

Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?

Imagine you are a business executive who wants to pursue an environment policy for your company that limits pollution and uses fewer raw materials but would cost more what might be the discussion to your next broad meeting how would you make your case to your shareholders

A155.0 9 piece of copper at 182 °c is dropped into 2500 g of water at 23.9 °c. (the specific heat of copper is 0.385 1/9°c.) calculate the final temperature of the mixture. (assume no heat loss to the surroundings.)