Juan is planning an investigation about natural reserves. which of these is most likely to be a reliable source of scientific information on the internet

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Why does bubbling occur when vinegar mixed with baking soda

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.