Drue

Suppose that the resistance between the walls of a biological cell is 4.9 × 10^9 ohms (a) What is the current when the potential difference between the walls is 68 mV? (b) If the current is composed of Na+ ions (q = +e), how many such ions flow in 0.45 s?

A large spool in an electrician's workshop has 52 m of insulation-coated wire coiled around it. When the electrician connects a battery to the ends of the spooled wire, the resulting current is 2.3 A. Some weeks later, after cutting off various lengths of...

There are approximately 110 million TVs in the United States. Each uses, on average, 80 W of power and is turned on for 5.9 hours a day. If electrical energy costs 0.11 dollars per kWh, how much money is spent every day in keeping the TVs turned on?

Multiple-Concept Example 9 reviews the concepts that are important to this problem. A light bulb is wired in series with a 116-Ω resistor, and they are connected across a 120.0-V source. The power delivered to the light bulb is 20.7 W. What is the resista...

Find a polynomial with integer coefficients that satisfies the given conditions. P has degree 2 and zeros 2 + i and 2 − i.

Find all the rational zeros of the polynomial, and then find the irrational zeros P(x)= 2x^4+15x^3+31x^2+20x+4

Simplify the trigonometric expression: cos^3x+sin^2x cos x

find the inverse of g(x)=(x+7)^3+4

Of the 7pens in ms.youngs desk,3 are blue. Of the 9pens in Mr.foxs desk, are blue. Which teacher has a greater fraction of pens that are blue