Which of the following does not contribute to the uncertainty? Group of answer choices

the regularities in the object being measured

the limitations of the measuring device

the skill of the person making the measurement

other factors that affect the outcome (depending on the situation)

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?