A thin wire with heavy weights attached to both ends is hung over a block of ice resting on two supports. If the wire cuts through the ice block while the block remains solid behind the wire, the process is called?
A. condensation B. sublimation C. regelation D. fusion Correct Answer: Option C – regelation
A boy observes a piece of stone at the bottom of a river 6.0m deep. If he looks from the surface of the river. What is the apparent distance of the stone from him? [Refractive Index of Water = 4/3]
A. 8.0m B. 5.5m C. 5.0m D. 4.5m Correct Answer: Option D = 4.5m Explanation Refractive Index = Real Depth/App. Depth 4/3 = 6/app. depth App Depth = (3 x 6)/4 = 4.5mWhich of the conditions below are necessary to produce interference fringes?
I. Coherence II. Same frequency III. Same wavelength IV. Same Intensity A. I and III B. I, II and IV C. I, II and III D. II and III Correct Answer: Option C – I, II and III
A quantity of water at 0°C is heated to about 30°C. At each degree rise in temperature, its density will?
A. rise steadily B. fall steadily C. fall then rise D. rise then fall Correct Answer: Option D – rise then fallProducts
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