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The membrane that surrounds a certain type of living cell has a surface area of 4.5 x 10-9 m2 and a thickness of 1.1 x 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 4.3. (a) The potential on the outer surface of the membrane is +47.4 mV greater than that on the inside surface. How much charge resides on the outer surface? (b) If the charge in part (a) is due to K+ ions (charge +e), how many such ions are present on the outer surface?
A spaceship moves past you at speed v. You measure the ship to be 287 m long, whereas an astronaut on the ship measures a length of 380 m. Find out v.
At time t=0 a grinding wheel has an angular velocity of 28.0 rad/sec. It has the constant angular acceleration of 35.0 rad/sec^2 until a circuit breaker trips at time t=1.80. From then on, the wheel turns through an angle of 433 as it coasts to the s..
how far from the woman will he be now. How various revolutions will the car have gone through when the magnitude of its total acceleration is 3.30 m/s^2.
What is the breaking strength
To see that it is easy to break a thighbone when falling in this fashion, find out the greatest distance through which his center of gravity can fall without his breaking a bone.
The wavenumber of the incident radiating in a Raman spectrometer is 20487 cm-1. What is the wavenumber of the scattered Stokes radiation
An 88 g arrow is fired from a bow whose string exerts the average force of 110 N on the arrow over a distance of 78.00 cm. What is the speed of the arrow as it leaves the bow.
Drawing on Erastothenes' method, if two observers are due north and south of each other and are separated by 490 km, what is the circumference of their spherical world if they see the same star on their meridian at altitudes of 29 degrees and 45 degr..
The rock strikes the ground a horizontal distance of 44 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. How long did the rock take to hit the ground? Give your answer in seconds to two d..
After falling from rest from a height of 26 m, a 0.5 kg ball rebounds upward, reaching a height of 16 m. If the contact between ball and ground lasted 1.6 ms, Evaluate average force was exerted on the ball?
Illustrate a basketball momentum vectors
A young woman buys a sports car that can accelerate at the rate of 5.47m/s2. She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.47s before Kathy. Stan ..
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