Answer:
any two
Explanation:
Gravitation force or gravitational attraction is a force of pulling or attraction that exist between any two bodies that have a mass. Each and every body attract each other with the force of gravity due to their masses.
Every object in this universe having mass and distance attracts every other object.
and gas as well not just petroleum
7 is correct but anything higher is considered alkaline. It's called base. anything lower is acidic!
Answer:
they board up the windows evacuate sometimes and barricade doors
Explanation: