An arrangement of source charges produces the electric potential
V = 5000x2 along the x-axis, where V is in volts and x is in meters.
What is the maximum speed of a 1.0 g, 10 nC charged particle that moves in this potential with turning points at +-8.0 cm?
The maximum Speed of Particle is 2.53 cm/s
The electric potential energy and electric Potential difference the related through given equation;
Here in this Question given Mass particle is;
And, the charge of particle is;
Due the arrangement of the sources electric charges which are produced are;
Here in this Equation V is in Volt and X is in meters
As charged particle moves at turning point at 8cm
Which denotes that;
At this Point Partcle will have only Potential energy, there will be no Kinetic energy.
Thus the Max Potential energy is;
At the time hence the particle comes back to the origin x=0, the potential energy converted into kinetic energy
Living cells “pump” singly ionized sodium ions, Na+, from the inside of the cell to the outside to maintain a membrane potential ∆Vmembrane = Vin - Vout = - 70 mV. It is called pumping because work must be done to move a positive ion from the negative inside of the cell to the positive outside, and it must go on continuously because sodium ions “leak” back through the cell wall by diffusion. a. How much work must be done to move one sodium ion from the inside of the cell to the outside? b. At rest, the human body uses energy at the rate of approximately 100 W to maintain basic metabolic functions. It has been estimated that 20% of this energy is used to operate the sodium pumps of the body. Estimate—to one significant figure—the number of sodium ions pumped per second.
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