Created by StemPy LabA block of mass hanging from a light spring of force constant oscillates vertically with time period . The spring is cut into two pieces whose natural lengths are in the ratio . The two pieces are then fixed side by side, in parallel, and the same block is hung from the combination. The new time period of oscillation is
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← Two spheres, A and B, are made of the same material and behave as black bodies. Sphere A has a radius of 1 cm and is kept at 4000 K. Sphere B has a radius of 4 cm and is kept at 2000 K. The ratio of the power radiated by A to the power radiated by B, and the ratio of the wavelength at which A radiates most strongly to the wavelength at which B does, are, respectively,Two small beads, each of mass 1 g, carry charges of +1 µC and -1 µC. They are fixed to the ends of a light insulating rod of length 2 cm. The rod can turn freely in a horizontal plane about a vertical axis through its midpoint. A uniform horizontal electric field of 1×10⁵ N/C is switched on. When the rod is turned slightly away from its equilibrium position and released, it oscillates. The time period of these small oscillations is closest to →
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