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An object is placed 100 cm in front of a lens of focal length 20 cm. A second lens is placed 35 cm beyond the first, this second lens having a focal length of 8 cm. If the height of the object is 6 cm, what is the height of the final image ?
An object that hangs form the ceiling of a staionary elevator by an ideal spring scilliates with a period T. If the elevator accelerates upward 2g , what will the period of oscillation of the object ?
A car is driving directly north on the freeway at a speed of 117 km/h and a truck is leaving the freeway driving 76 km/h in a direction that is 40° west of north. What is the velocity of the truck relative to the car?
Illustrate what is the time necessary for crossing if the hunter wishes to move neither upstream nor downstream whilst crossing the river? Draw the vectors to scale on a graph to determine the answer.
A standing wave on a 77.4cm long string has three antinodes. If the string has linear mass density 3.92×10?5kg/m and tension 10.1N , what are the wave's frequency
You have a 1.91-m-long stretched string with a mass of 19.3 g. When you oscillate the string at 440 Hz, obtain the tension in the string
What is the turntables angular speed as the block
It's generally okay to ignore relativistic effects when a particle's speed is less than 1.0% of the speed of light, Find the accelerating potential difference that will bring electrons to that speed, starting from rest
A 2.00×104kg railroad car is rolling at 1.00m/swhen a 5000kg load of gravel is suddenly dropped in.What is the car's speed just after the gravel is loaded
Two charged bodies exert the force of .145N on each other. If they are moved so that they are one fourth as far apart, what force is exerted.
A generator has a square coil consisting of 188 turns. The coil rotates at 118 rad/s in a 0.222-T magnetic field. What is the length of one side of the coil
A 1500-kW heat engine operates at 25 percent efficiency. The heat energy expelled at the low temperature is absorbed by a stream of water that enters the cooling coils at 20 degrees C. If 60 L flows across the coils per second, determine the incre..
The terminals of a 0.900V watch battery are connected by a 90.0?m?long gold wire with a diameter of 0.200mm, compute the current in the wire
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