Hat is the answer for this

Define a is a tiny pavket of energy

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d