«

»

Mar 01

Print this Post

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

Question: Q. You are given solid cubes of aluminium and iron, each of side 4 cm, ang two spring balances. Balance A has a range of 0 to 250g, while balance B has a range of 0 to 1000g. the preferred option for precise mass measurement would be to use the balance:
a) A for both
b) B for both
c)A for aluminium cube and B for iron cube
d)A for iron cube or B for aluminium cube

Permanent link to this article: http://www.plustwophysics.com/a-question-for-you-to-answer-cbse-class-x-science-mcq/

Comments

  1. Aaron Iba says:

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

  2. shreya says:

    hey whatzz the answer for this????

  3. 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

  4. 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

  5. Well…..head scratching indeed….

%d bloggers like this: