A70 percent efficient pump delivers water at 20°c from one reservoir to another 20 ft higher. the piping system consists of 60 ft. of galvanized-iron 2-in pipe, a reentrant entrance, two screwed 90° long-radius elbows, a screw open gate valve, and a sharp what is the input power required in horsepower for a flow rate of 0.4 ft/s.

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.