B: black and dull
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When a refrigerator is switched on for the first time, the air surrounding the ice-box is cooled. What happens to the…
An ice-cube has a mass of 7.50 g. The ice-cube is at 0°C. Heat from the surroundings reaches the ice-cube at an avera…
A bimetallic strip made from brass and iron is used as a thermostat. When the strip is heated, the brass expands more…
A student holds a sheet of paper with letters on it facing a plane mirror. The letters on the paper are shown. TOF Wh…
A semi-circular block is made from a plastic. A ray of light passes through it at the angles shown. To two decimal pl…
Convex lenses are used in cameras and as magnifying glasses. Which types of image are formed?