The photograph is given in the figure shows a section of a grille made up of straight and curved iron bars. How would you measure the length of the bars of this section, so that the payment could be made to the contractor?

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Solution

As the grille is made up of straight and curved iron bars, so the length of the bars can be measured with the help of thread which can be further measured using a scale. The length of the straight iron bars of the grille can also be measured directly with a measuring tape.

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Q. The photograph given in figure shows a section of a grille made up of straight and curved iron bars. How would you measure the length of the bars of this section, so that the payment could be made to the contractor?

Question 13

The photograph given above shows a section of a grille made up of straight and curved iron bars. How would you measure the length of the bars of this section, so that the payment could be made to the contractor?

Q. If a bar is made of copper whose coefficient of linear expansion is one and a half times that of iron, the ratio of force developed in the copper bar to the iron bar of identical lengths and cross-sections, when heated through the same temperature range (Young's modulus of copper may betaken to be equal to that of iron) is:

Q. An iron bar of length l, cross section A and Young's modulus Y is heated from

0^{\circ}

100^{o}

C. If this bar is held so that it is not permitted to expand, the force F that is developed, is proportional to :

Q. S1 Supposing you have to make a payment of Rs. 100, you could do so in coins.
S2 __________________________________________________________
S3 __________________________________________________________
S4 __________________________________________________________
S5 This paper money saves you a lot of trouble and also saves precious metal.
P - The person to whom the payment is being made would also find it very tedious.
Q - So the government gives you the alternative of paper money.
R - But so many coins would be very cumbersome to carry around.
Choose from the options given below:

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