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To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, so a sharp image always falls on the film. A camera with a telephoto lens (f = 210.0 mm) is to be focused on an object located first at a distance of 3.5 m and then at 54.0 m. Over what distance must the lens be movable?
A singly charged positive ion has a mass of 2.37 10-26 kg. After being accelerated through a potential difference of 246 V, Calculate the radius of the path of the ion in the field
A flat, solid cylindrical grinding wheel with a diameter of 26.0cm is spinning at 2900rpm when its power is suddenly turned off. A workman continues to press his tool bit toward the wheel's center
On Mars, where air resistance is negligible, an astronaut drops a rock from a cliff and notes that the rock falls about d meters during the first t seconds of its fall. Assuming the rock does not hit the ground first, how far will it fall during t..
A long freight train has a mass of 5×(10^6) kg and is initially traveling at 25 m/s. Find the time it takes the train to stop
A 10.0 m rope of negligible mass connects two astronauts, each having a mass of 75.0 kg. find the initial angular momentum of the system
A square loop of wire consisting of a single turn is perpendicular to a uniform magnetic field. The square loop is then re-formed into a circular loop, which also consists of a single turn and is also perpendicular to the same magnetic field.
Helium-neon laser light of wavelength 1004.5 nm is sent through a 0.473 mm wide single slit. What is the width of the central maximum on a screen 1.58 m from the slit? Answer in units of mm
q1. a parallel-plate capacitor is formed from two 2.0 rm cm times 2.0 rm cm electrodes spaced 5.0 rm mm apart. the
We drop a 26-g ice cube (0C) into 1000 g of water (20C). Find the total change of entropy of the ice and water when a common temperature has been reached
A 1443 kg railroad car traveling at a speed of 10m/s strikes an identical car at rest. what is their common speed afterward
How many conduction electrons are there in a 5.00 diameter gold wire that is 40.0 long? How far must the sea of electrons in the wire move to deliver -39.0 of charge to an electrode
A mountain climber stands at the top of a 32.5-m cliff that overhangs a calm pool of water. What initial velocity must the second stone have had, given that they hit the water simultaneously
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