What is a vector quantity? a. a quantity direction only b. a quantity with magnitude and direction c. a quantity with magnitude only d. a quantity with no magnitude and no direction?

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Energy flows from the producer level to the level. is called