Question

discuss the different aspects of non-cooperation movement.

Answer 1

non coorporation movement was started by mahatna gandhi in 1920
to drive british out of the country.

it was nothing but declaration of peace and non -violence war against British.
Result -
non-cooperation movement aparently failed.but it also benefited the indian economy. Indian mill-owners earned a good profit due to the programme of boycott. The import of sugar from England decreased considerably. The import of British cotton-goods decreased from Rs. 6.7 crores to Rs. 2.8 crores within a period of six months. Likewise, the import of iron decreased to 50%

Answer 2

Explanation:

Answer: It will take 22920 years to decay 112.5 g of 120 grams.

Explanation: Radioactive decay follows first order kinetics.

Half-life of carbon-14 = 5730 years

\lambda =\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{5730}=1.209\times 10^{-4}year^{-1}λ=

t

2

1

0.693

=

5730

0.693

=1.209×10

−4

year

−1

N=N_o\times e^{-\lambda t}N=N

o

×e

−λt

N = amount left after time t = (120-112.5)g= 7.5 g

N_0N

0

= initial amount = 120 g

\lambdaλ = rate constant =1.209\times 10^{-4}year^{-1}1.209×10

−4

year

−1

t= time = ?

7.5=120\times e^{- 1.209\times 10^{-4}years^{-1}\times t}7.5=120×e

−1.209×10

−4

years

−1

×t

t=22920yearst=22920years