A2 kg book is sitting on a table. a 10 n force is pulling it to the right. a 3 n force is pulling to the left. what is the net force acting on the book? a. 2 n down b. 7 n to the right c. 13 n to the right d. 15 n to the right

B..7 to the right

Explanation:

10-3=7N

Greater force of 10 means the book will move to the right.

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.