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The K+ concentration inside a nerve cell is much larger than the concentration outside it. Assume that the potential difference across the cell membrane is 90 mV. Assuming that the system is in equilibrium, estimate the ratio of concentration of K+ inside and outside the cell.
A 450 lb boy pushes on a 300 lb box with a force of 125 lb. If the box slides across the floor with constant velocity, what is the net force on the box
Determine what is the total charge of all protons in 6 gram of water
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.139 N when their center-to-center separation is 69.5 cm.
You are the technical consultant for an action-adventure film in which a stunt calls for the hero to drop off a 22.7-m tall building, What is the angular acceleration of the drum
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.14 m2 and whose thickness is 8 millimeter. compute what is the percentage lost by the window
A heavy stone of mass m is hung from the ceiling by a thin 8.25-g wire that is 65.0 cm long. When you gently pluck the upper end of the wire, What is the mass m of the stone
Your cat "Ms" (mass 7.00kg) is trying to make it to the top ofa frictionaless ramp 2.00 m long and inclined upward at 30 degreesabove the horizontal. what is her speed when she reaches the top of the incline
Copper pennies weighing 2.5 g have been placed in boiling water at 100 degree Celsius. How many pennies must be added to the water to raise the temperature to 31 degree Celsius
Green laser light with a wavelength of 521 nm strikes adifraction grating with 3000 lines/cm. How many spots appear on the screen
A flat piece of glass is supported horizontally above the flat end of a 11.0 cm long metal rod that has its lower end rigidly fixed. The thin film of air among the rod and the glass is observed to be bright when illuminated by light of wavelength 500..
X- rays are created in a standard x-ray tube by accelerating electron across a potential difference of V and having the electrons collide with a metal target to eject x-ray. when the wavelength of the x-ray is measured using Bragg diffraction from..
a ring of diameter 7.00 cm is fixed in place and carries a charge of 5.00 microc uniformly spread over its
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