0^(@)C তাপমাত্রায় 5 গ্রাম বরফ 40^(@)C তাপমাত্রায় 20 গ্রাম জল ধারণকারী একটি বীকারে ফেলে দেওয়া হয়। চূড়ান্ত টেম...

How much steam at 100^(@)C is needed to change 40 g of ice at -10^(@)C to water at 20^(@)C if the ice in a 50 g copper can? Assume that the can maintains the same temperature as the ice and water. Given that specific heat of copper is S_(Cu)=0.09 "cal"//gm^(@) and specific heat of ice is S_("ice")=0.5 cal /gm .^(@)C .

A brass rod of length 50 cm and diameter 3.0 mm is joined to a steel rod of the same length and diameter. What is the change in length of the combined rod at 250^(@)C , if the original lengths are at 40.0^(@)C ? Is there a 'thermal stress' developed at the junction ? The ends of the rod are free to expand. Coefficient of linear expansion of brass = 2.0 xx 10^(-5).^(@)C^(-1) and that of steel =1.2 xx 10^(-5).^(@)C^(-1) .

4 kg of ice at -20^(@)C is mixed with 5 kg of water at 40^(@)C . The water content in the equilibrium mixture is (S_("water")=1kcal//kg-C,S_(ice)=0.5kcal//kg-c,L_(f(water))=80kcal//kg)

Consider a metal scale of length 30cm and an object. The scale is calibrated for temp 20^(@)C . (a) What is the actual length of division which is shown as 1cm by scale at 40^(@)C . Given alpha_(s) = 2 xx 10^(-5)//"^(@)C . (b) What will be the reading of scale at 40^(@)C if the actual length of objects is 10cm . (c ) What will be the actual length of object at 40^(@)C if is measured length is 10cm . (d) What is % error in measurement for part (b) and (c). (e) If the linear expansion coefficient of object is alpha_(0) = 4 xx 10^(-5) and neglecting the expansion of scale, then answers of (b) and (c) parts. (f) If alpha_(0) = 4 xx 10^(-5) and alpha_(s) =2xx 10^(-5) then find answers of (b) and (c) part.

A brass rod of length 50 cm and diameter 3.0 cm is joined to a steel rod of the same length and diameter. What is the change in length of the combined rod at 250^(@)C , if the original length are at 40.0^(@)C ? (Coefficient of linear expansion of brass =2.0 xx 10^(-5)//^(@)C, steel = 1.2 xx 10^(-5)//^(@)C

Two identical calorimeters A and B contain an equal quantity of water at 20^(@)C . A 5 g piece of metal X of specific heat 0.2" cal g"^(-1).^(@)C^(-1) is dropped into A and 5 g piece of metal Y is dropped into B. The equilibrium temperature in A is 22^(@)C and that in B is 23^(@)C . The intial temperature of both the metals was 40^(@)C . The specific heat of metal Y ("in cal g"^(-1).^(@)C^(-1)) is

A steel wire of length 20 cm and uniform cross-section 1mm^(2) is tied rigidly at both the ends. If the temperature of the wire is altered from 40^(@)C to 20^(@)C , the change in tension. [Given coefficient of linear expansion of steel is 1.1xx10^(5) .^(@)C^(-1) and Young's modulus for steel is 2.0xx10^(11) Nm^(-2) ]

A calorimeter of water equivalent 10 g contains a liquid of mass 50 g at 40 .^(@)C . When m gram of ice at -10^(@)C is put into the calorimeter and the mixture is allowed to attain equilibrium, the final temperature was found to be 20^(@)C . It is known that specific heat capacity of the liquid changes with temperature as S = (1+(theta)/(500)) cal g^(-1) .^(@)C^(-1) where theta is temperature in .^(@)C . The specific heat capacity of ice, water and the calorimeter remains constant and values are S_("ice") = 0.5 cal g^(-1) .^(@)C^(-1), S_("water") = 1.0 cal g^(-1) .^(@)C^(-1) and latent heat of fusion of ice is L_(f) = 80 cal g^(-1) . Assume no heat loss to the surrounding and calculate the value of m.