Let's say you wanted to perform an experiment to measure how the flow of energy is related to the change in temperature in different objects. List the independent variable (what you change), the dependent variable (what you measure during the experiment) and what your control would be (what you compare your results to).

What is the function of the commutator in a dc motor? a. to spin the magnet b. to change direct current into alternating current c. to change alternating current into direct current d. to spin the wire coil

Explain why electric current cannot exist if a current doesn't have a voltage source.

It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.2 gpa). as one goes deeper and deeper in the ocean, the pressure increases by 10000 pa for every meter below the surface. if a diver goes down 80.0 m in the ocean, by how much does each cubic centimeter of her blood change in volume? give the answer in cubic centimeters (actually one cubic centimeter equals one milliliter).