Friction is directly proportional to an object’s . Frictional force also depends on the types of that are in contact with each other.

Describe some of the common health conditions associated with air pollution.

Select all that apply. which of the following are functions of the skeletal system? 1. to provide the body with a strong and mobile framework 2. to allow the body to move 3. to protect internal organs from sunlight, bacteria, and injury 4. to supply the body with blood cells and minerals

The goal of the flu vaccine is to prevent you from becoming infected with influenza. select the best answer from the choices provided. t f