Which type of mirror would you use to cook a hot dog and why?

How would doubling the made of an object change the objects potential energy

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.