In a convection current___. warm fluid sinks to replace cool fluid

warm fluid is more dense, and therefore, rises

heat flows from cooler areas to warmer areas

cool fluid is more dense, and therefore, sinks

Which type of microscope would allow the viewer to see ribosomes inside a cell?

Calculate the heat capacity per object when the total energy is 4 quanta. (think of this in terms of increasing from 3.5 quanta of energy in the system to 4.5 quanta of energy in the system, if that were possible.) c4 = __ j/k/object

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up