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4. Solve the following with formula.(FULL EXPLANATION)
a. What must be the temperature so that it will be twice its value in Celsius?
b. A bridge is made from 20 m long iron rods. At temperature 18 °C, the distance between the two rods is 0.4 cm. Up to what temperature will bridge be in good shape?
c. At 15 °C the height of Eiffel Tower is 324 m. If it is made of iron, what will be the increase in length in "cm" , at 30 °C?
d. Two substances A and B have specific heats 'c' and '2 c' respectively. If A and B are given Q and 4Q amounts of heat respectively, the change in their temperature is the same. If the mass of A is 'm' what is mass of B?
e. When a substance having mass of 3kg receives 600cal. of heat, it's temperature increases by 10 °C. What is the specific heat of the substance?
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