Created by StemPy LabThree resistors of , and are connected in parallel. This group is connected across a cell of emf and internal resistance . The power used in the resistor, in watts, is ____.
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← A block of mass 2 kg hangs at rest from a light vertical spring of force constant 200 N/m. It is pulled down a further 5 cm and released, so it oscillates up and down. Taking g = 10 m/s², the largest tension in the spring during the motion, in newtons, is ____.A thin biconvex lens is made of glass of refractive index 1.5. Its two surfaces have radii of curvature 20 cm and 30 cm. It is placed in contact with a thin concave lens of focal length 40 cm, in air. The focal length of the combination, in centimetres, is ____. →
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