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The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, a potential difference of about 0.070 V exists across the membrane. The thickness of the membrane is 8.6 x 10-9 m. What is the magnitude of the electric field in the membrane?
A lightbulb operates at a power of 60 watts when connected to a potential difference of 120 volts. In this condition, how many electrons are passing though it per second
A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor directly below 1.3 s later. How deep is the ocean at this point? Suppose the speed of sound in seawater is 1560 m/s and d..
A component with a 20 Ohm resistor is rated for use at power levels not exceeding 2,282 mW. How much current can safely flow through the component
The three capacitors C= 2.0E-6F in series are connected across a 30V battery. Find the potential difference across each
The speed of sound in bone is 3500 m/s. How much time does it take the echo of a sound wave to travel from the back of the bone to the front of the bone if the bone is 2.50 cm thick.
The lenses of a particular set of binoculars have a coating with index of refraction n = 1.38, and the glass itself has n = 1.52. what is the minimum thickness of the coating
You shine a laser on a plastic prism made from an unknown material and measure the angles relative to the normal that the light takes both inside and outside the medium. What is the index of refraction of the plastic object
A weather vane initially at rest has a moment of inertia of 0.104 kg · m2 about its axis of rotation. Find the angular velocity of the weather vane just after it is struck
A uniform electric field exists in the region between two oppositely charged plane parallel plates. Find the magnitude of this electric field
As an object is heated to a very high temperature and becomes self-luminous, What causes the color shift
An ideal monatomic gas is the working substance of a Carnot engine. During the isothermal expansion the volume doubles. Compute the temperature of the reservoirs between which the engine operates
High-speed stroboscopic photographs show that the head of a 250-g golf club is traveling at 52 m/s just before it strikes a 46-g golf ball at rest on a tee. Find the speed of the golf ball just after impact
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