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A real ammerter has non-zero resistance, and so acts like aresistor in a circuit. One ammerter has resistance 0.5Ω. Whenit is placed across a battery (with emf ε and internalresistance r), the terminal voltage of the battery is 5.0V. Adifferent ammerter has resistance 0.25Ω. When it is placedacross the same battery, the terminal voltage is 2.94V. Determinethe emf and the internal resistance of the battery.
A ball is thrown toward a cliff of height (h) with a speed of30 m/s and an angle of 60 degrees above the horizontal. What is the ball's impact speed
a spare pressure vessel flange bolt is discovered inside the reactor shroud during a refueling outage of a nuclear
What is a density of the block
An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 400-g sample of silver at an initial temperature of 88°C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibriu..
A tennis ball is served horizontally at a height of 2.40 m, 12.0 mfrom a net that is 0.900 m high. (a) If it is to clear the net byat least 0.200m, what is its minimum initial velocity? (neglect airresistance) (b) if it clears the net by 0.200m, ..
If a mechanical wave has a wavelength of 2.80 meters and its period is 4.5 seconds, at what speed does the wave travel
Damped forced oscillations, A single stage vibration isolation system consists of a heavy granite slab (100 kg) sitting on legs which act as a vertical damped spring. The "Q" (Quality Factor) of the system is 8.0, and the velocity damping coeffici..
A bat can detect small objects, such as an insect, whose sizeis approximately equal to one wavelength of the sound the batmakes. what is the smallest insect a bat can detect
A pencil beam of 200-keV photons is normally incident on a 1.4-cm-thick sheet of aluminum pressed against a 2-mm- thick sheet of lead behind it. What fraction of the incident photons penetrate both sheets without interacting? What would be the differ..
A photographic image of a building is 0.0920 m high. The image was made with a lens with a focal length of 55.0 mm. determine the height of the building.
Three vectors , , and each have a magnitude of 52 m and lie inan xy plane. Their directions relative to the positivedirection of the x axis are 30°, 193°, and318°, respectively.
A sonar echo returns to a submarine 1.40 s after being emitted. What is the distance to the object creating the echo
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