Which is an example of an energy transformation?

(A) a soccer ball sitting in a field.

(B)

a person waiting at a crosswalk.

(C)

an unlit candle.

(D)

a boulder falling off a tall cliff.

Which of the following statements about buffers is true? Group of answer choices A buffer composed of a weak acid of pKa = 5 is stronger at pH 4 than at pH 6. At pH values lower than the pKa, the salt concentration is higher than that of the acid.

Why is the use of inquiry process a practical way to approach science?

What is the greatest degree of ionic character found in a sulfur bond

How much electricity do we use

The rhythmic use of spoken or semi-sung lyrics is called: a. Singing c. Rapping b. Hip Hop d. Chanting

Rank the following in order of strength of inter-molecular forces from strongest to weakest: solid liquid gas

K20 ionic or covalent

Give the four symbols for physical states of reactants and products, and tell what each means.

Which element is more electronegative, sulfur or nitrogen?

How does igneous rock become metamorphic rock?