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A battery having an emf of 10.99 V delivers 83 mA when connected to a 65.4 ? load. Find the internal resistance of the battery. Answer in units of ?.
You are riding a train as it rounds a curve of radius 375 meter at a constant speed. Evaluate what is the speed of the train
Suppose a block of mass 2.5.0 kg rests on a horizontal plane. and the coefficient of static friction wren the surfaces is 0.220. What is the maximum static frictional force that could act on the block? Show your work.
a girl follows a passage 200m straight west then 210m in a direction 45 degrees east of south and then 280m at
The G string on a violin has a fundamental frequency of 196 Hz. It is 29.0 cm long and has a mass of 0.500 g. While this string is sounding, a nearby violinist effectively shortens the G string on her identical violin (by sliding her finger down t..
In a double-slit experiment, the second-order bright fringe is observed at an angle of 0.56°. If the slit separation is 0.12 mm, then what is the wavelength of the light?
The entropy of an α-ideal gas changes in the following way as a function of temperature and volume: ΔS = nR ln(Vf/Vi) + αnR ln(Tf/Ti) For an adiabatic process, the change in T is determined by the change in V. In this problem you will compute th..
Two cars drive on a straight highway. At time t=0, car 1 passes mile marker 0 traveling due east with a speed of 16.0 m/s . At the same time, car 2 is 1.1 km east of mile marker 0 traveling at 30.0 m/s due west. Car 1 is speeding up with an accele..
an athlete executing a long jump leaves the ground at a 30.9o angle and travels a horizontal distance 7.03m. what was
The centers of a 14kg lead ball and a 130g lead ball are separated by 7.0cm. What gravitational force does each exert on the other
It is claimed that if a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, Find the minimum speed of a lead bullet for such an event to happen
A speedboat increases its speed uniformly from v1 = 20 m/s to vf = 25 m/s in a distance of 2.40 102 m. (a) Draw a coordinate system for this situation and label the relevant quantities, including vectors.
The power brick for the author's laptop computer has a power rating of 90 W. It uses a step-down transformer to convert the AC voltage from a wall socket (Vrms = 120 V) to a value near 12 V. find the rms current in the output coil of the transforme..
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