B: black and dull
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According to the kinetic theory, matter is made up of very small particles in a constant state of motion. Which row b…
A balloon filled with air is gently heated. What happens to the mass and the density of the air inside the balloon?
A certain liquid is used in a liquid-in-glass thermometer. It does not expand uniformly with temperature. What effect…
A student collects stones and finds their density. Which apparatus is needed to measure the mass and the volume of th…
A uniform beam is balanced at its midpoint. An object is placed on the beam, as shown. Which force will rebalance the…
A student finds the centre of mass of a triangular lamina PQR. He drills a small hole at Q. He suspends the lamina fr…