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1. A linear object that is h = 1.75 m tall is placed a distance a = 0.780 m from a small light source. A shadow is produced on a screen that is a distance b = 1.17 m behind the object. Compute the height of the shadow.
2. A pinhole camera that is a = 10.20 cm long is placed a distance b = 19.0 m from a 4.35 m high object. Compute the size of the image produced by the camera.
a 0.50shy-microf capacitor is being charged in a circuit. an ammeter in the circuit reads 1.5 a. what is the
The outer edge of the grooved area of a long-playing record is at a radial distance 35 cm from the center; What is the radial speed of the needle
A positron, accelerated from rest by a fixed potential difference, acquires a speed of 0.3c. What speed is achieved by a proton accelerated from rest by the same potential?
Two spheres with uniform surface charge density, first with a radius of 7.5cm and the second with a radius of 4.5cm , What is the surface charge density on the second sphere
A ball of mass 160 g is released from rest at a height of2.10 m above the floor and it rebounds straight up to a height of 0.900 m. Decide the magnitude of the ball's change in momentum due to its contact with the floor. If the contact time by the fl..
q1. when a surface is irradiated with light of wavelength 4950 a a photo current appears that vanishes if a retarding
A 9.00 kg box slides across a level floor such that its speed changes from 4.50 m/s to 1.20 m/s over a distance of 4.00m. How much work was done by friction? What was the work done by gravity?
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 128-kg laser sensor that measures the thickness of the ice, find the tension in the cable towing the sensor
You are told that there are 17 charges with the same charge Q > 0 C and 19 charges with the same charge - Q in a closed container of arbitrary shape. Calculate the net electric flux through the container
Two disks of identical mass but different radii (r and 2r) are spinning on frictionless bearings at the same angular speed ?0, but in opposite directions. The two disks are brought slowly together. The resulting frictional force between the surfac..
when combing your hair, you transfer electrons from the hair onto the comp. is your hair then positively or negatively charged? how about the comb.
to help keep his barn warm on cold days a farmer stores 832 kg of solar-heated water lf 3.35e5 jkg in barrels. for how
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