I In an experiment to determine what
type of acid is the most corrosive,
which of the following must be a
controlled variable?
A. The acids used
B. The material the acid is poured on
C. The size of the hole created by the acid
D. All of the above

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

They can measure  the amount of energy gained or lost

Answer(false);