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Two straight wire-electrodes are placed, in parallel, across your index finger a distance 2.50 cm apart. The terminals of a battery, with a voltage of 8.20 V, are attached, one to each electrode. If an ammeter in series with the electrodes displays a current of 0.760 µA, what is the resistance of your skin?
The width of the contact of each wire with your skin is 1.10 cm and the thickness of the conducting layer of your skin is 0.023 mm.Assuming that these two dimensions define an area through which the current flows, calculate the resistivity of your skin.
A dentist uses a small mirror with a radius of 36 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 16 mm from the tooth, what is the magnification of an image.
A moving particle encounters an external electric field that decreases its kinetic energy from 8650 eV to 6910 eV as the particle moves from position A to position B. The electric potential at A is -56.5 V, and the electric potential at B is +28.1..
A rectangular container measuring 23 cm 51 cm 65 cm is filled with water. What is the mass of this volume of water in kilograms and grams.
A 124-? resistor and a 163-? resistor are both connected in parallel across a power supply, what is the exact potential drop (in V) across the 163-? resistor
In response to a stimulus, membrane can become permeable to Na ions. As Na ions rush into the cell, the interior of the cell reaches an electric potential of about 40 rm mV.
At a certain point, A, in its motion, its velocity angle is 19° above the horizontal. At another point, B, later in its motion, its velocity angle is 39° below the horizontal. Illustrate what is the horizontal distance from point A to point B?
why circular orbit of the particle encloses a magnetic flux.
A 40-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, kinetic energy decreases to 240J from 470J. How high does she rise during this interval? Avoid air resistance.
Three blocks, each of mass 12 kg are on the frictionless table. A hand pushes on the left most box (A) such that the three boxes accelerate in the positive horizontal direction as shown at a rate of a = 1.1 m/s2. What is the net horizontal force on b..
A circular loop in the plane of the paper lies in a 0.55T magnetic field pointing into the paper. If the loop's diameter changes from 20 cm to 5 cm what is the magnitude of the average induced emf.
A shopper pushes a cart 39 m south down one aisle and then turns 90.0° west and moves 27 m. He then makes another 90.0° turn and moves 14 m.
A 380-kg sailboat has an acceleration of 0.636 m/s2 at an angle of 65.5 ° north of east. Find the direction of the net force that acts on the sailboat
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