Select the correct answer. Which statement about forces is true?
ОА.
Forces are defined by strength but not direction,
OB
Forces are defined by direction but not strength.
Forces are defined by both strength and direction.
ОС.
OD
Forces act only on objects that are in contact.

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.