In a certain article, laser therapy was discussed as a useful alternative to drugs in pain management of chronically ill patients. To measure pain threshold, a machine was used that delivered low-voltage direct current to different parts of the body (wrist, neck, and back). The machine measured current in milliamperes (mA). The pretreatment experimental group in the study had an average threshold of pain (pain was first detectable) at ? = 3.19 mA with standard deviation ? = 1.03 mA. Assume that the distribution of threshold pain, measured in milliamperes, is symmetric and more or less mound-shaped. (Round your answers to two decimal places.) (a) Use the empirical rule to estimate a range of milliamperes centered about the mean in which about 68% of the experimental group will have a threshold of pain from  mA to  mA (b) Use the empirical rule to estimate a range of milliamperes centered about the mean in which about 95% of the experimental group will have a threshold of pain

Q: hat energy (in J) is dissipated by a lightning bolt having an 18,500 A current, a voltage of 2.05 ✕…

A:

Q: A 0.7 m length of (9.009x10^0) mm diameter wire carries (2.16x10^0) mA current when (7.8210x10^0) mV…

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Q: The heating coil in an electric tea pot is made of nichrome wire with a radius of 0.375 mm. If the…

A: The answer is given below Explanation:Step 1:(a) 14.37 ohm(b) 4.23 mStep 2:Step 3: Step 4:

Q: In a certain article, laser therapy was discussed as a useful alternative to drugs in pain…

A: In a certain article, laser therapy was discussed as a useful alternative to drugs in pain…

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A: Let the resistivity of the material of the resistor ρ, the electric field applied on its ends be E,…

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A: Since 4 cells which are in series,Each will have I(short circuit)=2 mA There are 8 such…

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A: Given: ∆V=1.5 V Energy loss, E=5.5 J Time, t=24 hrs   To find (a) write an expression for current.…

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Q: The current supplied to an air conditioner unit is 2.98 amps. The air conditioner is wired using a…

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Q: The ammeter shown in the figure reads 4.4 A and the current goes in the direction shown (I2). R1 =…

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Q: The figure below shows the charge on a capacitor and the current through the resistor as a function…

A: According to the guidelines I will attempt only 1st part please repost part B again. Given the two…

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A: The area of cross section of the tube is  A=L1W1-L2W2=1×0.5-1-2×0.050.5-2×0.05A=0.14…

Q: An electric utility company supplies a customer's house from the main power lines (120 V) with two…

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Q: The current supplied to an air conditioner unit is 2.50 amps. The air conditioner is wired using a…

A: The problem can be solved by using the concepts of current density and drift velocity. Current…

Q: As time progresses, all quantities will decay exponentially:  Q ( t ) = Q0 e -t/RC.   Q0 is 14.4 uC,…

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Q: ) In the figure what value must R have if the current in the circuit is to be 0.93 mA? Take ₁ = 2.2…

A: Current = i = 0.93 mA E1 = 2.2 V E2 = 3.4 V

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A: As per the guidelines we will solve only the first problem. Please upload the other problem…

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.