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A camera lens with a focal length of 50mm and aperture of f/1.4 is used to image a scene. The photographer focuses the camera at an object in the scene 4m from the camera. The resolution of the camera at the image plane is such that image points appear out of focus when circles of confusion exceed 0.02mm diameter. Determine the limits of the depth of field in the photograph, i.e. calculate the range of object distances which appear in focus?
A 370-g block is dropped onto a vertical spring with spring constant k=3.2 N/cm. While the spring is being compressed, what work is done by the block's weight
The filament of an incandandescent light bulb is a very thin solid cylindrical shape, with a total length of 450 mm and a diameter of 0.45 mm. What is the peak wavelength emitted by this light bulb
A 22.5 g bullet is fired from a rifle. It takes 2.60 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
q1. a persons heart and head are 1.2m and 1.7m above the feet respectively. find out the potential energy associated
A physics lecture room has a volume of 251m^3. Calculate the mass of the air in the room
A particle of charge q = e moves in a circle of radius = 0.42 m with speed v = 2.150×107 m/s. find the maximum torque exerted on the loop by a uniform magnetic field of magnitude B = 0.60 T
Two charged bodies separated by a distance d exert an electrical force on each other. The charge on one of the bodies is doubled. The electrical forces on each body now
A ceiling fan with 89.00 cm diameter blades is turning at 61rpm. Suppose the fan coasts to a stop 26s after being turned off.
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.595m from the axis of rotation of the stool. She is given an angular velocity of 3.05rad/s , after which she pulls the dumbbells in until they ar..
An object, 0.75 cm tall, is placed 12.0 cm to the left of a diverging lens (f = -8.00 cm). determine the focal length of the converging lens
A block of wood weighs 50.0 N whenweighed in air. A sinker is attached to the block, and the weightof the wood-sinker combination is 220N when the sinker alone is immersed in water. Find the density of the block
a parallel-plate capacitor is designed so that the plates can be pulled apart. the capacitor is initially charged to a
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