A current of 0.300 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heart beat and disrupting the flow of blood (and thus oxygen) to your brain. If that current persists for 1.39 min, how many conduction electrons pass through your heart?

A teapot with a surface area 9 325 cm2 is to be plated with silver. It is attached to the negative electrode & an electrolytic cell containing Silver nitrate (Ag+ NO3-). The cell is Powered by a 12.0- resistance battery and has a 의 son If the density & silver is 1.05 x 104 kg/m³, Over what time Interval does a 0-133-mm Jayer of Silver build up on the teapot?!! 의

A beam contains 2.0 × 109 doubly charged positive ions per cubic centimeter, all of which are moving north with a speed of 3.1 × 105 m/s. What is (a) the magnitude of the current density and (b) direction of the current density  J→. (c) What additional quantity do you need to calculate the total current i in this ion beam?

The voltage across a membrane forming a cell wall is 84 mV and the membrane is 7.5 nm thick.  What is the electric field strength in the cell wall, in volts per meter?

A certain single ion channel is selectively permeable to K+ and has a resistance of 1.15 GΩ , therefore a current of potassium ions through the channel is possible. During an experiment, the channel is open for approximately 1.50 ms while the voltage across the channel is maintained at 89.5 mV. How many K+ ions, ?, travel through the channel during this time?

The leaves of a tree lose water to the atmosphere via the process of transpiration. A particular tree loses water at the rate of 4.0 x 10-8 m3/s. What mass of water is lost over the course of a single day? (Use 1000 kg/m3 for the density of water). 3.456 v kg This water is replenished by the upward flow of sap through vessels in the tree's trunk. If the trunk contains about 1800 vessels, each 0.1 mm in diameter, what is the speed of the sap flowing in the vessels? 0.243 x mm/s