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An important factor in many biochemical cell processes is thepotential difference across a cell membrane. The inside of a cellis at a lower electric potential than the outside, with a potentialdifference of 0.080 V between them. The membrane consists oftwo layers of chainlike lipid molecules packed together like theblades of grass in a lawn, but it is only 7.5 nm thick. Whatis the strength of the electric field inside the membrane?
Calculate the speed of a proton after it accelerates from rest through a potential difference of 170V, Calculate the speed of an electron
When tightening a bolt, you push perpendicularly on a wrench with a force of 161 N at a distance of 0.120 m from the center of the bolt. How much torque are you exerting
a heavy flywheel rotating on its central axis is slowing down because of friction in its bearings. find its rotational speed at the end of the second minute
An electron in an oscilloscope is accelerated as a result of the potential difference between the cathode and anode. The electron has negligible initial speed and a final speed of 4.60 107 m/s. Find the voltage drop from cathode to anode.
A juggler throws a ball straight up with some initial velocity. Half a second later, the juggler throws another ball straight up from the same height, then what is the initial velocity of each ball
A sled weighing 100N is held in place on a frictionless 20 degree slope by a rope which is attached to a stake at the top. What is the normal force of the slope acting on the sled
A 1.5-V battery is connected in series with a 3.3-k? resistor, a 4.7-k? resistor, and a 1.0-k? resistor. Calculate the current (in mA) through and the voltage (in V) across each resistor
A capacitor is made from two 1.0 cm diameter coins separated by a 0.14 mm thick piece of paper (K = 3.7). How much charge is on each coin
A long, thin rod (length = 4.0m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +8.0 μC point charge isfixed to one end of the rod, and a -8.0 μC point charge isfixed to the other end.
Calculate this temperature.
A certain centrifuge produces a centripetal acceleration of magnitude exactly 1230g at a point 11.9 cm from the axis of rotation. Find the number of revolutions per second
A dentist wants a small mirror that, when 3.00 cm from a tooth, will produce a 4.5X upright image. What must its radius of curvature be
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