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An important factor in many biochemical cell processes is the potential difference across a cell membrane. The inside of a cellis at a lower electric potential than the outside, with a potential difference 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?
A certain speed boat weighs 5,880 N. It can accelerate from 0 to 40 m/s in 5 seconds. a) What is the mass of the boat?b) What is the acceleration?c) How large is the net force acting on the boat?
How far in front of the cattle should the pilot release the hay so that the bales will land at the point where the cattle are stranded.
a cylinder piston initially contains 5x10^-3 m^3 of helium gas, at a pressure of 1atm and witih a temperature of 50 degrees celcius. how many moles of helium is contained by the cylinder piston
A ball on the porch rolls 60 {rm cm} to the porch's edge, drops 40 {rm cm}, continues rolling on the grass, and eventually stops 80 {rm cm} from the porch's edge.
A 56 kg astronaut floating at rest in space outside a space capsule throws his 0.50kg hammer such that it moves with the speed of 14.00 m/s relative to the capsule. What happens to the astronaut? What is the astronaut's speed.
A meter stick is balanced horizontally on a pivot attached at the 50-cm mark. A 300-gram mass is attached to the right half of the meter stick 30 cm from the pivot point and it swings down. You wish to rebalance the meter stick horizontally with a 45..
A spring of stiffness 25 kN m-1 is compressed by an initial load of 5 kN, gradually applied, What is the total work done on the spring
Coherent light from a sodium-vapor lamp is passed through a filter that blocks everything except for light of a single wavelength. compute the wavelength of the light that falls on the slits
A coordinate system S' moves with constant velocity along the x axis of a second coordinate system S. If, as measured in S, two events occur at the same place and are separated in time by deltat, what is the spatial separation of these two events as ..
A jetliner has a mass of 1.1 x 105 kg and flies at a speed of 120 m/s. what would be the magnitude of the jetliner's momentum
A 2.95-kg block initially at rest at the top of a 3.69-m incline with a slope of 42.7° begins to slide down the incline. How fast is the block moving at the bottom of the incline
Calculate the dc voltage applied to the circuit.
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