Use the model below to answer the question. -
Which of the following chemical formulas is represented in the model above?

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.

Prior knowledge can be gained from personal experience and a) forming well-developed hypotheses. b) listening to opinions of other people on a topic. c) researching previous experiments and results on a topic. eliminate d) no other methods. it can only be gained by personal experience.

Leopold's genotype is xy. what does this mean? a. leopold had hemophilia b. leopold did not have hemophlilia c. leopold was a carrier of hemophilia, but did not have the disease d. leopold's daughter would have hemophilia