मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता ११ वी

Answer the following question. Clearly state the difference between heat and temperature?

Advertisements
Advertisements

प्रश्न

Answer the following question.

Clearly, state the difference between heat and temperature?

फरक स्पष्ट करा
Advertisements

उत्तर

  Heat Temperature
1.

Heat is energy in transit. When two bodies at different temperatures are brought in contact, they exchange heat.

OR

Heat is the form of energy transferred between two (or more) systems or a system and its surroundings by virtue of their temperature difference.

Temperature is a physical quantity that defines the thermodynamic state of a system.

OR

Heat transfer takes place between the body and the surrounding medium until the body and the surrounding medium are at the same temperature.

2. Heat exchange can be measured with the help of a calorimeter. Temperature is measured with the help of a thermometer
3. Heat (being a form of energy) is a derived quantity. Temperature is a fundamental quantity.
4. S.I. unit: J (joule) S.I. unit: K (kelvin)
5. Dimension: [L2M1T–2 K0] Dimension: [L0M0T0K1]
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 7: Thermal Properties of Matter - Exercises [पृष्ठ १४०]

APPEARS IN

बालभारती Physics [English] Standard 11 Maharashtra State Board
पाठ 7 Thermal Properties of Matter
Exercises | Q 2. (i) | पृष्ठ १४०

संबंधित प्रश्‍न

Define emissive power and coefficient of emmision of a body.


A metal sphere cools at the rate of 4°C / min. when its temperature is 50°C. Find its rate of cooling at 45°C if the temperature of surroundings is 25°C.


Compute the temperature at which the r.m.s. speed of nitrogen molecules is 832 m/s. [Universal gas constant, R = 8320 J/k mole K, molecular weight of nitrogen = 28.]


A metal ball cools from 64 °C to 50 °C in 10 minutes and to 42 °C in next 10 minutes. The ratio of rates of fall of temperature during the two intervals is _______.


The kinetic energy per molecule of a gs at temperature T is ________.

(a) `(3/2)RT`

(b) `(3/2)K_BT`

(c) `(2/3) RT`

(d) `(3/2)("RT"/M)`


A body cools from 80° C to 70° C in 5 minutes and to 62° C in the next 5 minutes. Calculate the temperature of the surroundings.


Does the temperature of a body depend on the frame from which it is observed?


Why do marine animals live deep inside a lake when the surface of the lake freezes?


Which of the following pairs may give equal numerical values of the temperature of a body?


A spinning wheel A is brought in contact with another wheel B, initially at rest. Because of the friction at contact, the second wheel also starts spinning. Which of the following energies of the wheel B increases?
(a) Kinetic
(b) Total
(c) Mechanical
(d) Internal


A body A is placed on a railway platform and an identical body B in a moving train. Which of the following energies of B are greater than those of A, as seen from the ground?
(a) Kinetic
(b) Total
(c) Mechanical
(d) Internal


When a solid melts or a liquid boils, the temperature does not increase even when heat is supplied. Where does the energy go?


A person's skin is more severely burnt when put in contact with 1 g of steam at 100°C than when put in contact with 1 g of water at 100°C. Explain


The atmospheric temperature in the cities on sea-coast change very little. Explain


When a hot liquid is mixed with a cold liquid, the temperature of the mixture ____________ .


The temperature of a solid object is observed to be constant during a period. In this period

(a) heat may have been supplied to the body

(b) heat may have been extracted from the body

(c) no heat is supplied to the body

(d) no heat is extracted from the body


A concrete slab has a length of 10 m on a winter night when the temperature is 0°C. Find the length of the slab on a summer day when the temperature is 35­°C. The coefficient of linear expansion of concrete is 1.0 × 10–5 °C–1.


A pendulum clock shows correct time at 20°C at a place where g = 9.800 m s–2. The pendulum consists of a light steel rod connected to a heavy ball. It is taken to a different place where g = 9.788 m s–1. At what temperature will the clock show correct time? Coefficient of linear expansion of steel = 12 × 10–6 °C–1.


The volume of a glass vessel is 1000 cc at 20°C. What volume of mercury should be poured into it at this temperature so that the volume of the remaining space does not change with temperature? Coefficients of cubical expansion of mercury and glass are 1.8 × 10–6 °C–1 and 9.0 × 10–6 °C–1 , respectively.


Analogy

Evaporation:: 100°C: Freezing:: ______.


The degree of hotness and coldness of a body is called ______.  


The temperature of a liquid drops from 365 K to 361 K in 2 min. Find the time during which the temperature of the liquid drops from 344 K to 342 K.

(Take, room temperature = 293 K)


Which state of matter has particles that vibrate about fixed equilibrium positions?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×