Which of the following are clues that a chemical reaction may have taken place?

a. temperature remains constant

b. release of heat

c. formation of a solid

d. mass increase

Answer asap! the weather patterns on earth are shown in this image. explain why there are convection currents; why there are hotter and colder parts of earth.

Which example has gravitational potential energy? a.a horse slowing down from a run b.an apple about to fall from a tree branch c.a bicycle being pedaled down a horizontal path d.beaker sitting on the floor

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter