Plz two forces are described below: force 1: the upward force exerted by a chair on us when we sit on the chair force 2: the force which prevents us from slipping when we walk on a smooth surface which statement is true about the forces? both are contact forces. both are non-contact forces. force 1 is a contact force and force 2 is a non-contact force. force 1 is a non-contact force and force 2 is a contact force.

I believe those are both non-contact forces bc it's not something physical

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: