Created by StemPy LabA radium-226 nucleus at rest decays into a radon-222 nucleus and an alpha particle. The total energy released, which appears as the kinetic energy of the two particles, is . Taking the masses in proportion to the mass numbers, the kinetic energy of the alpha particle is closest to
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← In a double-slit experiment, each slit has width a and the distance between the centres of the slits is d = 4.5a. The light is monochromatic. On the screen, the interference fringes lie inside the broad central maximum of the single-slit diffraction pattern. How many bright interference fringes lie inside this central maximum?A block of mass 4 kg is released from rest at the top of a smooth track shaped like a quarter of a circle of radius 1.8 m. At the bottom, the track joins a smooth horizontal floor, where a block of mass 2 kg is at rest. The two blocks collide head-on, and the collision is perfectly elastic. Taking g = 10 m/s², the speed of the 2 kg block after the collision, in m/s, is ____. →
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