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The first accurate estimate of cell membrane thickness used a capacitive technique, which determined the capacitance per unit area of cell membrane in a macroscopic suspension of cells; the result was about 1 uF/cm^2. Assuming a dielectric constant of about 3 for the membrane, find the membrane's thickness.
An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +8.11 x 105 m/s to a final velocity of 1.21 x 106 m/s while traveling a di..
A proton is released from rest inside a region of constant, uniform electric field E1 pointing due North, What is the ratio of the magnitude of E2 to the magnitude of E1
A cannon, placed in the valley, fires a shell at 52 degrees with respect to the horizontal line. The initial speed of the shell is 516 m/s, Calculate the range of the shell
A round loop of diameter 12 cm, carrying a current of 0.40 A, is placed inside a magnetic field B = 0.20 i T + 0.40 j T. What is the potential energy of the loop
In which collision is the impulse on the cart greater. The magnitude of the charge on an electron is 1.6e-19 C
A spherical conducting shell of inner radius "a" and outer radius "b" carries a total charge of +5Q distributed on the surface of a conducting shell. Find the charge distribution on the conductor
An engine does 20000 J of work and rejects 6120 J of heat into a cold reservoir whose temperature is 285 K. What would be the smallest possible temperature of the hot reservoir.
A heat engine operating at maximum efficiency has an efficiency of 25%. The temperature of the cold reservoir is 300 K. What is the temperature of the hot reservoir
What diameter must a copper wire have if its resistance is to be the same as that of an equal length of aluminum wire
The radius of Mars about one half that of Earth, and its mass is about 1/10. Using this information, estimate the acceleration due to gravity near the surface of Mars in m/s2
A car starts from rest and moves around a circular track of radius 80.0 m. What angle ( in radians ) does the net acceleration make with the car's velocity at this time
A 45kg figure skater is spinning on the toes of her skates at 0.50rev/s . Her arms are outstretched as far as they will go. In this orientation, What is her new rotation frequency, in revolutions per second
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