You have a 10 ml solution with an initial concentration of 40g/ml perform a 1:5 dilution four times what is the concentration of tube 4 please help

In what part of a chloroplast does glucose production occur? a. atp synthase b. photosystem ii c. photosystem d. stroma

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

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.