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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.
Two converging lenses, separated by a distance of 40.5 cm, are used in combination. The first lens, located to the left, has a focal length of 15.7 cm. Find the intermediate image distance relative to the corresponding lenses
Describe the arrangment of circuit elements that is called a voltage divider and the relationship among the various potential differences for that arrangement.
A weather satellite encircles the earth at an orbital speed of 6200 m/s. How high above the earth's durface does it orbit
A ball is launched directly upward from the ground level with an initial speed 24 m/s. What is the greats height reached by the ball
Intense white light is incident on a diffraction grating that has 625 lines/mm. What is the angular separation between the violet edge (400 nm) and the red edge (700 nm) of the first order spectrum produced by the grating
Objective questions based on work, energy, power.
A 65.0 kg bungee jumper steps off abridge with a light bungee cord tied to her and to the bridge. The unstretched length of the cord is 11.0m. She reaches the bottom of her motion 36.0 m below the bridge before bouncing back
A rectangle has an area of 33.66 cm2. When both the length and width of the rectangle are increased by 1.30 cm, find the length of the shorter of the two sides of the initial rectangle
Your friend's Frisbee has become stuck 19m above the ground in a tree. You want to dislodge the Frisbee by throwing a rock at it. If you release the rock 1.7m above the ground, with what minimum speed must you throw it
The secondary colors, cyan, magenta, and yellow, can each be obtained by subtracting a color from white light. Which primary color is subtracted in each case
Your little brother is sitting in a wagon playing with his toys. what was the velocity of the football when you threw it towards your brother
A green photon ( = 551 nm) is absorbed by a free hydrogen atom, initially at rest. What is the recoil speed of the hydrogen atom
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