NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Chinka Shah
Subject: Physics
, asked on 15/1/18
A calorimeter of mass 60g contains 180g of water at 29C. find temperature of mixture when 37.2 g if ice at -10C is added to it
Answer
2
Girish Raj
Subject: Physics
, asked on 16/12/17
Solve this:
Q.6. Find the result of mixing 10 g of ice at - 10
°
C with 10 g of water at 10
°
C. Specific heat capacity of ice = 2.1 J
g
-
1
K
-
1
, specific latent heat of ice = 336 J
g
-
1
and specific heat capacity of water = 4.2 J
g
-
1
K
-
1
.
Ans. 0.625 g ice will melt and temperature will remain 0
°
C.
Answer
0
Nischal
Subject: Physics
, asked on 18/3/18
Answer
Q(c). The temperature of 170g of water at 50°C is lowered to 5°C by adding certain amount of ice to it. Find the mass of ice added.
Given: Specific heat capacity of water = 4200 J kg
–1
°C
–1
and specific latent heat of ice =336000 J kg
–1
Answer
1
Illeana Singh
Subject: Physics
, asked on 30/9/18
0.1 kg ball falls from a height of 10 m and rebounds to a height of 7 m .what is the change in the internal energy of the ball?
Answer
1
Isha Das
Subject: Physics
, asked on 15/2/18
Q Two liquids A and B have specific heat capacities 2.5 J/g
°
C
-
1
and 3.2 J/g
°
C respectively.
(i) Which liquid is a good conductor of heat? Why?
(ii) Which liquid is more suitable as a liquid in radiators for cooling?
Q. A calorimeter of mass 60 g contains 180 g of water at 29
°
C. Find the final temperature of the mixture, when 37.2 g of ice at —10
°
C is added to it (specific heat capacity of water = 4200 J/kg K, latent heat of ice = 336 x
10
3
J/kg, specific heat capacity of ice = 2100 J/kg K, specific heat capacity of the calorimeter is 0.42 J/g
°
C
-
1
).
Q. What are background radiations?
Q. Write an equation of an a emission from
U
92
238
?
Answer
1
Rajay Rajay Chakrasingh
Subject: Physics
, asked on 23/9/18
Why the water to be used in the calorimeter should be slightly below room temperature?
Answer
2
Ayush Chandra
Subject: Physics
, asked on 29/12/17
Solve this:
Q11. The amount of heat energy required to convert 1 kg of ice at – 10°C to water at 100°C is 7.77, 000 J. Calculate the specific latent heat of ice. Specific heat capacity of ice = 2100 J kg
–1
K
–1
, specific heat capacity of water = 4200 J kg
–1
K
–1
.
Ans. 3,36,000 J kg–1
Q12. 200 g of ice 0°C converts into water at 0°C in 1 minute when heat is supplied to it at a constant rate. In how much time 200 g of water at 0 °C will change to 20°C ? Take specific latent heat of ice =336 J g–1.
Ans . 15 g
Answer
1
Ankita Nath
Subject: Physics
, asked on 29/1/18
Water boils at 120 degrees celsius in a pressure cooker. why???
Answer
5
Harsha Ojha
Subject: Physics
, asked on 26/12/17
Please answer these questions:-
Q9. (a) (i) Write an expression for the heat energy liberated by a hot body.
(ii) Some heat is provided to a body to raise its temperature by 25°C. What will be the corresponding raise in temperature of the body as shown on the Kelvin scale ?
(iii) What happens to the average kinetic energy of the molecules as ice melts at 0°C
(b) A piece of ice at 0°C is heated at a constant rate and its temperature recorded at regular intervals till steam is formed at 100°C. Draw a temperature-time graph to represent the change in phase. Label the different parts of your graph.
(c) 40 g of ice at 0°C is used to bring down the temperature of a certain mass of water at 60°C to 10°C. Find the mass of water used. (Specific heat capacity of water = 4200 J/kg K, Specific latent heat effusion of ice = 336 × 10
3
Jkg
–1
)
Answer
4
Pranit Kothawade
Subject: Physics
, asked on 29/1/18
(ii) Give one example where high specific heat capacity of water is used as a heat reservoir.
(iii) Give one example where high specific heat capacity of water is used for cooling purposes.
Answer
1
😍shifa😍👑chauhan 👑 ...
Subject: Physics
, asked on 27/8/20
Tosif . kya kam he ...
Answer
32
Udith
Subject: Physics
, asked on 18/12/17
A calorimeter of mass 60 g contains 180 g of water at 29 degree C. Find the final
temperature of the mixture, when 37.2 g of ice at ?10 degree C is added to it (specific
heat capacity of water = 4200 J/kg K-1, latent heat of ice = 336000J/kg, specific heat capacity of ice = 2100 J/kg K-1, specific heat capaicity of the calorimeter is 0.42 Jg-1 degree C-1).
Answer
0
Rajay Rajay Chakrasingh
Subject: Physics
, asked on 2/3/19
What is the difference between uniform and nonuniform ACCELERATION?
Answer
1
Sarthak Chakraborty
Subject: Physics
, asked on 20/8/18
Why
The vessel used for measurement is made of thin and sheet of copper
Answer
1
Anil Kumar Gupta
Subject: Physics
, asked on 6/1/18
a liquid of mass 100g at 120 degree celcius is poured in water at 20 degree celcius when final temperature recorded is 40t degree. if the specific heat capacity of the liquid is 0.8 joule per gram per degree celcius calculate the initial mass of the waterplease !! could someone help me out to solve the question
Answer
1
1
2
3
4
Next
What are you looking for?
Q.6. Find the result of mixing 10 g of ice at - 10C with 10 g of water at 10C. Specific heat capacity of ice = 2.1 J , specific latent heat of ice = 336 J and specific heat capacity of water = 4.2 J .
Ans. 0.625 g ice will melt and temperature will remain 0C.
Q(c). The temperature of 170g of water at 50°C is lowered to 5°C by adding certain amount of ice to it. Find the mass of ice added.
Given: Specific heat capacity of water = 4200 J kg–1°C–1 and specific latent heat of ice =336000 J kg–1
(i) Which liquid is a good conductor of heat? Why?
(ii) Which liquid is more suitable as a liquid in radiators for cooling?
Q. A calorimeter of mass 60 g contains 180 g of water at 29C. Find the final temperature of the mixture, when 37.2 g of ice at —10C is added to it (specific heat capacity of water = 4200 J/kg K, latent heat of ice = 336 x J/kg, specific heat capacity of ice = 2100 J/kg K, specific heat capacity of the calorimeter is 0.42 J/g ).
Q. What are background radiations?
Q. Write an equation of an a emission from ?
Q11. The amount of heat energy required to convert 1 kg of ice at – 10°C to water at 100°C is 7.77, 000 J. Calculate the specific latent heat of ice. Specific heat capacity of ice = 2100 J kg–1 K–1, specific heat capacity of water = 4200 J kg–1 K–1.
Ans. 3,36,000 J kg–1
Q12. 200 g of ice 0°C converts into water at 0°C in 1 minute when heat is supplied to it at a constant rate. In how much time 200 g of water at 0 °C will change to 20°C ? Take specific latent heat of ice =336 J g–1.
Ans . 15 g
Q9. (a) (i) Write an expression for the heat energy liberated by a hot body.
(ii) Some heat is provided to a body to raise its temperature by 25°C. What will be the corresponding raise in temperature of the body as shown on the Kelvin scale ?
(iii) What happens to the average kinetic energy of the molecules as ice melts at 0°C
(b) A piece of ice at 0°C is heated at a constant rate and its temperature recorded at regular intervals till steam is formed at 100°C. Draw a temperature-time graph to represent the change in phase. Label the different parts of your graph.
(c) 40 g of ice at 0°C is used to bring down the temperature of a certain mass of water at 60°C to 10°C. Find the mass of water used. (Specific heat capacity of water = 4200 J/kg K, Specific latent heat effusion of ice = 336 × 103 Jkg–1)
(iii) Give one example where high specific heat capacity of water is used for cooling purposes.
temperature of the mixture, when 37.2 g of ice at ?10 degree C is added to it (specific
heat capacity of water = 4200 J/kg K-1, latent heat of ice = 336000J/kg, specific heat capacity of ice = 2100 J/kg K-1, specific heat capaicity of the calorimeter is 0.42 Jg-1 degree C-1).
The vessel used for measurement is made of thin and sheet of copper