Physics
Grade-9
Easy
Question
The following picture represents a/an _____.
- Open system
- Isolated system
- Heat
- Heat and matter
Hint:
The ice absorbs heat from the surrounding air, the air becomes cool, and the ice changes into water. In this case, the state of the matter is changing due to the absorption of heat. The internal energy (or ) of ice is increasing as it absorbs energy (Q) from the surrounding air.
The correct answer is: Open system
The ice cube plus then any water that forms from it is your closed system. This system is very well defined. A closed system is one in which no mass enters of leaves.
Related Questions to study
Physics
Which of the following denotes the state of the system?
- Pressure
- Volume
- Temperature
- All of the above
Which of the following denotes the state of the system?
PhysicsGrade-9
- Pressure
- Volume
- Temperature
- All of the above
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The kinetic energy of a particle of a system is different from its other properties such as pressure, temperature and volume as it is not a/an ____.
- Intensive property
- Microscopic property
- Extensive property
- Macroscopic property
The kinetic energy of a particle of a system is different from its other properties such as pressure, temperature and volume as it is not a/an ____.
PhysicsGrade-9
- Intensive property
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Pick the odd one out.
- Pressure
- Volume
- Temperature
- Density
Pick the odd one out.
PhysicsGrade-9
- Pressure
- Volume
- Temperature
- Density
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In an open system, _______ can get into or out of the system.
- Heat
- Matter
- Both a and b
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In an open system, _______ can get into or out of the system.
PhysicsGrade-9
- Heat
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______ separates the system from the surroundings.
- Boundary
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______ separates the system from the surroundings.
PhysicsGrade-9
- Boundary
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Which of the following is an extensive property of a system?
- Temperature
- Pressure
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- Density
Which of the following is an extensive property of a system?
PhysicsGrade-9
- Temperature
- Pressure
- Number of moles
- Density
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What are the particles of the system (red-hot iron rod) shown below?
- Iron molecules
- Iron atoms
- Copper atoms
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What are the particles of the system (red-hot iron rod) shown below?
PhysicsGrade-9
- Iron molecules
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Physics
Which of the following cannot be a heat reservoir?
- Air
- Stove top
- Sea
- Earth
Which of the following cannot be a heat reservoir?
PhysicsGrade-9
- Air
- Stove top
- Sea
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Physics
During a thermodynamic process, 30 joules of heat are added to a gas while 25 joules of work are done by the gas. The change in internal energy of a system is ____ J.
During a thermodynamic process, 30 joules of heat are added to a gas while 25 joules of work are done by the gas. The change in internal energy of a system is ____ J.
PhysicsGrade-9
Physics
During an isothermal process 125 J of heat are removed from a trapped gas. Find out the change in internal energy of the system.
During an isothermal process 125 J of heat are removed from a trapped gas. Find out the change in internal energy of the system.
PhysicsGrade-9
Physics
In an isothermal process the change in internal energy of the system is ____.
In an isothermal process the change in internal energy of the system is ____.
PhysicsGrade-9
Physics
During a thermodynamic process, 438 J of heat is removed from a gas system while 238 J of work is done on the gas. The change in internal energy of a system is _____ J.
- 200
- - 200
- - 676
- 676
During a thermodynamic process, 438 J of heat is removed from a gas system while 238 J of work is done on the gas. The change in internal energy of a system is _____ J.
PhysicsGrade-9
- 200
- - 200
- - 676
- 676
Physics
A cold reservoir is touched to a system, which of the following may happen?
- The heat flows from the system to the reservoir
- The internal energy of the system decreases
- The temperature of the system decreases
- All of the above
A cold reservoir is touched to a system, which of the following may happen?
PhysicsGrade-9
- The heat flows from the system to the reservoir
- The internal energy of the system decreases
- The temperature of the system decreases
- All of the above
Physics
When there is no heat exchange between the system and the reservoir, ____.
- The system is said to have enough heat
- The reservoir is said to have enough heat
- The system and the reservoir are said to be in thermal equilibrium
- The system is not connected to the reservoir
When there is no heat exchange between the system and the reservoir, ____.
PhysicsGrade-9
- The system is said to have enough heat
- The reservoir is said to have enough heat
- The system and the reservoir are said to be in thermal equilibrium
- The system is not connected to the reservoir
Physics
The internal energy of a system does not change in a/an _____ process.
(A) Isothermal
(B) Adiabatic
(C) Isochoric
(D) Isobaric
- A and C
- A and B
- B and D
- All of them
The internal energy of a system does not change in a/an _____ process.
(A) Isothermal
(B) Adiabatic
(C) Isochoric
(D) Isobaric
PhysicsGrade-9
- A and C
- A and B
- B and D
- All of them
