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An object is placed 25.0cm from a thin converging lens. A screen is positioned so that a sharp image of the object is seen on the screen. When the object is moved 4.0cm closer to the lens, the screen must be moved 3.0cm farther away from the lens in order to retain a sharp image. Determine the focal length of the lens.(What is the focal length of the lens?)
two forces at right angle with each other have a resultant of 58kN, If one of the forces is 40kN find the magnitude of the other forces
What is the work done to take a particle of mass m from surface of the earth to a height equal to 2R (R=radius of earth )? Ans) Initial PE= - GMm/R Final PE = - GMm/3R
Energy Transformation on a Roller Coaster A roller coaster ride is a thrilling experience that includes a wealth of physics. Part of the physics of a roller coaster is the phys
How a CPH does stop or its speed decreases? Answer; it is a principle that Vc is stable thus that; gradV c =0 Thus, never V c increases or decreases.
What is the Ohm Law? Ohm discovered that the amount of current was directly proportional to the voltage (more voltage gives more current) and inversely proportional to the resi
two insulated charged copper spheres A and B of identical size have charge q and -3q respectably .when they are brought in contact with each other and then separated,what are the n
How then do I recognize a product's quality? There are some ways. The status and name of the company making the product is significant and its geographical location. Several co
A section through a magnetic circuit of uniform cross-sectional area 2cm 2 is shown in fi gure. The cast steel core has a mean length of 25cm. The air gap is 1mm w
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