Suppose that the resistance between the walls of a biological cell is 4.2 × 109 ω. (a) what is the current when the potential difference between the walls is 75 mv? (b) if the current is composed of na+ ions (q = +e), how many such ions flow in 0.74 s?

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

The heliocentric and the geocentric models of the solar system included these central principles

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation 2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!