A Question for you to answer (CBSE Class X Science MCQ)

5 Responses to “A Question for you to answer (CBSE Class X Science MCQ)”

1. Aaron Iba says:

   March 3, 2010 at 2:48 pm

   I really like what you blog about here, very fresh and intelligent.

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2. shreya says:

   March 14, 2010 at 6:34 am

   hey whatzz the answer for this????

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3. physicsmaster says:

   March 14, 2010 at 12:42 pm

   Quick Reference of densities Metal or alloy————————kg/cu.m aluminium – melted ———————2560 – 2640 aluminium bronze (3-10% Al) ——–7700 – 8700 aluminium foil —————————-2700 -2750 antifriction metal———————— 9130 -10600 beryllium ———————————–1840 beryllium copper———————— 8100 – 8250 brass – casting—————————–8400 – 8700 brass – rolled and drawn——————8430 – 8730 bronze – lead——————————–7700 – 8700 bronze – phosphorous——————8780 – 8920 bronze (8-14% Sn)————————7400 – 8900 cast iron————————————–6800 – 7800 cobolt—————————————– 8746 copper—————————————– 8930 delta metal———————————– 8600 electrum———————————– 8400 – 8900 gold—————————————–19320 iron———————————————–7850 lead—————————————– 11340 light alloy based on Al———————– 2560 – 2800 light alloy based on Mg—————– 1760 – 1870 magnesium——————————— 1738 mercury————————————— 13593 molybdenum—————————- 10188 monel——————————— 8360 – 8840 nickel——————————— 8800 nickel silver——————————— 8400 – 8900 platinum——————————— 21400 plutonium——————————— 19800 silver——————————— 10490 steel – rolled——————————— 7850 steel – stainless————————– 7480 – 8000 tin——————————— 7280 titanium——————————— 4500 tungsten——————————– 19600 uranium———————————- 18900 vanadium——————————– 5494 white metal——————————– 7100 zinc—————————————-7135

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4. Plus Two Physics says:

   March 14, 2010 at 6:06 pm

   The density of Aluminium is approx 2.700 g/m3 and that of iron is approx 7.900 g/m3. That means a 4cm x 4cm x 4cm = 64 cm3 iron cube will weigh 7.9x 64 = 505.6 g which implies one has to use balance B for iron The Aluminium cube will weigh 2.7*64 = 172.8 g which implies Balance A is suitable for Aluminium. So the correct answer is c)A for aluminium cube and B for iron cube

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5. Shraddha the witty says:

   March 16, 2010 at 11:11 am

   Well…..head scratching indeed….

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