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The membrane that surrounds a certain type of living cell has a surface area of 7.4 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 4.6.
(a) The potential on the outer surface of the membrane is +84.8 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 0.6410-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later, you notice that the ice cube has completely melted into a puddle of water.
One end of a long rod (n=1.5) is formed into a convex surface with a radius of curvature of 6cm. Find the image and object focal lengths, f' and f, and mark the locations of the foci in your to-scale sketch
An important feature of the Carnot cycle is that: A) its efficiency can be 100% B) its efficiency depends on the absolute temperature of the hot reservoir used.
A 57-kg water skier is being pulled by a nylon tow rope that is attached to a boat. The unstretched length of the rope is 11 m, What is the change in the length of the rope when the skier has an acceleration whose magnitude is 0.90 m/s2
What are the magnitudes of forces that act upon links? What is the tension in the rope and one end of the catenary is fixed to the left pole. Massless rope of length l connects second end of the catenary and the second pole.
A scientific supply catalog advertises a material having the index of refraction of 0.85. Is that a better product to buy? Why or why not.
A solid, uniform, spherical boulder (I=2/5 MR^2) starts from rest and rolls down a hill. The top 1/4 of the hill is rough enough to cause the boulder to roll without slipping, How high is the hill
A rollercoaster with passengers has a mass of 2500 kg. This rollercoaster is powered to the top of a 25 m hill where it pauses for a moment at rest. What is the speed of the rollercoaster at the top of the vertical loop
Dr Doreen's sister Karen got a yellow camaron for her birthday. She races up to meet with Dr Doreen. What was Dr Doreen's acceleration
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. How fast are the waves traveling
For a Heat of Fusion Lab: If we used the metal inner Calorimeter cup instead of the Styrofoam cup, how would this affect the final temperature
A 60g ball of clay is thrown horizontally at 10m/s toward a 1.8kg block sitting at rest on a frictionless hi surface. The clay hits and sticks to the block. What impulse does the block exert on the clay
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