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Leah and Arif now do a practice problem.
Suppose you are in a partially darkened room holding a flat piece of white cardboard in one hand and a converging lens of focal distance 6.6 x 10-2 m in your other hand. You want to form an image of the window in front of you, which is at a distance of 1.93 m in front of the lens.
How far behind the lens should the cardboard be held to form as sharp an image as possible?
If the height of the window is 1.00 m, find the height of its image.
Trucks can be run on energy stored in a rotating flywheel, by an electric motor getting the flywheel up to its top speed of 200 rad/s. One such flywheel is a solid, uniform one cylinder with a mass of 500 kg and a radius of 1 m.
A space probe is launched from Earth, headed for deep space. At a distance of 15,000 miles from the Earth's center, What is the size of the force when it is at 30,000 miles from the Earth's center
A circular wire loop of radius 0.50 m lies in a plane vertical to a uniform magnetic field of magnitude 0.40 T. If in 0.10 s the wire is reshaped from a circle to a square, but remains in the plane, what is magnitude of the average induced emf in t..
a 2800 kg elevator carries a maximum load of 835.1 kg. a constant frictional force of 4500 newtons retards the elevator's motion upward. what minimum power must the motor deliver to lift the fully loaded elevator at a constant speed of 2.08m/s
The G string on a violin has a fundamental frequency of 196Hz. It is 32.5 cm long and has a massof 0.500 g. what is the effective length of her string
A coil with a radius of 2cm is wrapped with 400 turns of wire uniformly along its 20cm length. what EMF will be produced in the coil
Chevy volt main battery has capacitance to store 16.5kWH of electrical energy with the nominal voltage equal to 390 V. what would have to be the capacitance C of that capacitor
A parallel plate capacitor has plates of area A and seperation of d and is charged to a potential difference of V.Derive expressions for the new potential difference
you throw a ball m 2kg with an initial velocity of 20 ms at an angle of 60 degrees from the top of a 30m cliff. a
A 4.00 kg hollow sphere of radius 5.00 cm starts from rest and rolls without slipping down a 30.0 degree incline. If the length of the incline is 50.0 cm, then the velocity of the center of mass of the hollow sphere at the bottom of the incline is:
A car is traveling 80 m/s from left to right when the brakes are applied. (The acceleration is constant.) After 15s, it comes to a stop. How far did it travel before it came to a stop
At the Indianapolis 500, you can measure the speed of cars just by listening to the difference in pitch of the engine noise between receding and approaching cars. Evaluate how fast is it going
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