Question

a bridge is made from 20 m long iron rods.at temperature 18 c the distance between two rods is 0.4cm up to what tempreture will the bridge be in good shape?

Answer 1

Answer:

Upto 35.4°c temperature will be the bridge be in good shape.

Explanation:

According to the problem  l(rod) = 20 m

The distance between two rods = 0.4 cm

The temperature is increased so as well as the rods must be expand upto 0.2 cm

Now let the temperature be t which will help the bridge to be in good shape,

Δ l/l= aΔt [ where a is the linear coefficient for iron]

=> 0.4/2000= 11.5 x 10^(-6) x (t-16)

t= 18+ 0.4/2000 11.5 x 10^(-6)

 = 35.4°c

Answer 2

Answer: The farmer assured his wife that the mongoose was a friendly animal and it won't hurt their baby. The farmer also said that the mongoose was as sweet as their baby and they were best friends. Question 4.

According to me 56...

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