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The bellows of an adjustable camera can be extended so that the largest distance from the lens to the film is 1.21 times the focal length.
If the focal length of the lens is 5.22 cm, what is the distance from the closest object that can be sharply focused on the film? Answer in units of cm.
The third floor of a house is 6.00 m above street level. How much work is essential to move a 159 kg refrigerator to the third floor.
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.744 rev/s. find the initial and final kinetic energies for this system
Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.25 km long. What is the resistance of such a wire at 20°C
Imagine you started to walk towards the west. Imagine that you can walk forever and that you can even walk on water. If you walk in the same direction forever, what will happen? Where will you end up?
A tennis ball is thrown from ground level with velocity v_0 directed 30 degrees above the horizontal. what is the magnitude of the intial velocity
What is the moment of inertia of the disk for rotation about an axis through the edge of the disk
Electric eels generate electric pulses along their skin that can be used to stun an enemy when they come into contact with it. What power is delivered to the unfortunate enemy
A 5.66 kilogram object falls freely (neglect air resistance), after being dropped from rest. Compute the initial kinetic energy, the final kinetic energy, and the change in kinetic energy
A 1.0 C charge is 15 meter from a second charge, and the force between them is 1.0 Newton. Determine what is the magnitude of the second charge
A bucket of mass 2.00 kg is whirled in a vertical circle of radius 1.10 m. At the lowest point of its motion the tension in the rope supporting the bucket is 25.0 N. Find the speed of the bucket
An engine flywheel initially rotates counterclockwise at 5.39 rotations per second. Then, during 21.3 seconds, its rotation rate changes to 2.11 rotations per second clockwise. Find the flywheel\'s average angular acceleration (including its sign) in..
A 18 kilo-ohm resistor is in series with a 75-mH inductor and an ac source. Evaluate what the impedance of the circuit if the source frequency is 70 Hertz. Evaluate what the impedance of the circuit
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