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Two liquids A and B are at 30 C and 20 C, respectively. When they are mixed in equal masses, the temperature of the mixture is found to be 26 C. The ratio of their specific heat is
08
Sep
Two liquids A and B are at 30 C and 20 C, respectively. When they are mixed in equal masses, the temperature of the mixture is found to be 26 C. The ratio of their specific heat is respectively. When they are mixed in equal masses the temperature of the mixture is found to be [...]
A solid material is supplied with heat at constant rate. The temperature of the material changing with heat input as shown.
08
Sep
A solid material is supplied with heat at constant rate. The temperature of the material changing with heat input as shown. A solid material is supplied with heat at constant rate. The temperature of the material changing with heat input as shown. September 8, 2021 Category: Cengage NEET by C.P Singh , Chapter 20 - [...]
Heat is supplied to a certain homogeneous sample of matter at a uniform rate. Its temperature is plotted against time as shown in the figure. Which of the following conclusions can be drawn?
08
Sep
Heat is supplied to a certain homogeneous sample of matter at a uniform rate. Its temperature is plotted against time as shown in the figure. Which of the following conclusions can be drawn? Heat is supplied to a certain homogeneous sample of matter at a uniform rate. Its temperature is plotted against time as shown [...]
A liquid of mass m and specific heat c is heated to a temperature 2T. Another liquid of mass m/2 and specific heat 2 c is heated to a temperature T. If these two liquids are mixed, the resulting temperature of the mixture is
08
Sep
A liquid of mass m and specific heat c is heated to a temperature 2T. Another liquid of mass m/2 and specific heat 2 c is heated to a temperature T. If these two liquids are mixed, the resulting temperature of the mixture is A liquid of mass m and specific heat c is heated [...]
Hailstone at 0oC falls from a height of 1km on an insulating surface converting whole of its kinetic energy into heat. What part of it will melt: (g=10m/s^2)
08
Sep
Hailstone at 0oC falls from a height of 1km on an insulating surface converting whole of its kinetic energy into heat. What part of it will melt: (g=10m/s^2) Hailstone at 0oC falls from a height of 1km on an insulating surface converting whole of its kinetic energy into heat. What part of it will melt: [...]
An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20∘C? The temperature of boiling water is 100∘C
08
Sep
An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20∘C? The temperature of boiling water is 100∘C An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from [...]
A lead bullet penetrates into a solid object and melts. Assuming that 50% of its kinetic energy was used to heat it, calculate the initial speed of the bullet. The initial temperature of the bullet is 27^∘ C and its melting point is 327^∘ C . Latent heat of fusion of lead = 2.5 × 10^4 J/k g and specific heat capacity of lead = 125 J/kg- K .
08
Sep
A lead bullet penetrates into a solid object and melts. Assuming that 50% of its kinetic energy was used to heat it, calculate the initial speed of the bullet. The initial temperature of the bullet is 27^∘ C and its melting point is 327^∘ C . Latent heat of fusion of lead = 2.5 × [...]
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A 50 Kg man is running at a speed of 18 Km H−1. If all the kinetic energy of the man can be used to increase the temperature of water from 20°C to 30°C ,
A lead bullet penetrates into a solid object and melts. Assuming that 50% of its kinetic energy was used to heat it ,
how much water can be heated with this energy? ,
Two bodies at different temperature are mixed in a calorimeter. Which of the following quantities remain conserved?
08
Sep
Two bodies at different temperature are mixed in a calorimeter. Which of the following quantities remain conserved? Two bodies at different temperature are mixed in a calorimeter. Which of the following quantities remain conserved? September 8, 2021 Category: Cengage NEET by C.P Singh , Chapter 20 - Heat and Calorimetry , Part 1 ,
A ball of mass 1 kg is dropped on a floor from a height of 2.0 m. After the collision it rises up to a height of 1.5 m. Assume that 40% of the mechanical energy lost goes as thermal energy into the ball. The rise in the temperature of the ball is
08
Sep
A ball of mass 1 kg is dropped on a floor from a height of 2.0 m. After the collision it rises up to a height of 1.5 m. Assume that 40% of the mechanical energy lost goes as thermal energy into the ball. The rise in the temperature of the ball is A 50 [...]
A metallic ball and highly stretched spring are made of the same material and have the same mass. They are heated so that they melt. The latent heat required
08
Sep
A metallic ball and highly stretched spring are made of the same material and have the same mass. They are heated so that they melt. The latent heat required A metallic ball and highly stretched spring are made of the same material and have the same mass. They are heated so that they melt. The [...]