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A battery with an emfof 9.00 V has an internal resistance r. When connected to aresistor R, the terminal voltage is 8.80 V and the current is 0.11A. When a second identical battery is added in series and the externalresistor is R = 15 Ohms what is the resulting current?
A speck of dirt is embedded 3.00cm below the surface of a sheet of ice having a refractive index of 1.309. What is the apparent depth of the speck
Speedboat A negotiates a curve whose radius is 118 m. Speedboat B negotiates a curve whose radius is 270 m. Each boat experiences the equivalent centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
A long, straight wire carries a current of 51 A. The magnetic field produced by this current at a certain point is 9.5 x 10-5 T. How far is the point from the wire
The rotor (flywheel) of a toy gyroscope has mass 0.150 kg. Its moment of inertia about its axis is 1.20x10^-4kgm^2. Find the upward force exerted by the pivot
A 115 mCi radioactive tracer is made in a reactor. When delivered to a hospital 16 hours later its activity is 95 mCi. What is the tracer's half-life
The quartz tube is actually 921mm long × 15mm diameter ... use the tube circumference and length to: estimate the light's maximum Electric Field , at the outside of the tube
200 Ohm, 0.5mA galvanometers are usedfor making a 20 A ammeter and a 120 V voltmeter. Find resistance of the corresponding shunts
A proton accelerates from rest in a uniform electric field of 628 N/C. At some later time, its speed is 1.10106 m/s. How far has it moved in that interval
Compute the most probable distance that a nitrogen molecule will traverse in tissue after 0.5 s if the molecule experiences 1012 collisions/s; assume that the mean free path in air is 10-7 m.
At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.8 m until, Find the change in its velocity during the turn
its nighttime and youve dropped your goggles into a swimming pool that is 4.0m deep. if you hold a laser pointer 1.1m
A 91-kg man’s thighbone has a relaxed length of 0.50 m, across-sectional area of 7.0 x 10^–4 m^2, and a Young’s modulus of 1.1 x10^10 N/m^2. By how much does the thighbone compress when the manis standing on both feet?
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