Question
Internal energy = _____ + _______.
- Gravitational energy, potential energy
- Kinetic energy, potential energy
- Kinetic energy, thermal energy
- Thermal energy, gravitational energy
Hint:
The total energy within a substance or a system is called internal energy.
The correct answer is: Kinetic energy, potential energy
Internal Energy is made up of kinetic energy and Potential energy of the constituent particles.
The sum of the electronic energy, nuclear energy, chemical bond energy, potential energy and kinetic energy. Internal energy is made up of kinetic energy and potential energy of the constituent particles. The kinetic energy arises due to the motion of its particles like translational energy, rotational energy, vibrational energy etc. The potential energy arises from different types of interaction between the particles, and it includes electronic energy, nuclear energy,energy due to molecular interaction,etc.
The S.I.unit of internal energy is Joule(J).
The C.G.S unit of internal energy is ergs.
Related Questions to study
The particles of a substance possess _____.
The particles of a substance possess _____.
The molecules of which form of water have the highest kinetic energy?
Out of the three states of matter, gaseous phase has always maximum kinetic energy...so water molecules also possess the highest kinetic energy in gaseous phase that is in the steam form. We have to give energy to liquid water to make water vapour and this energy goes as kinetic energy of molecules.
And also we can observe that gas occupy all the volume available to it. This is also possible due to kinetic energy.
The molecules of which form of water have the highest kinetic energy?
Out of the three states of matter, gaseous phase has always maximum kinetic energy...so water molecules also possess the highest kinetic energy in gaseous phase that is in the steam form. We have to give energy to liquid water to make water vapour and this energy goes as kinetic energy of molecules.
And also we can observe that gas occupy all the volume available to it. This is also possible due to kinetic energy.
When an ice cube is dropped into a cup of hot coffee, the heat flows from _________.
Heat is the transfer of thermal energy between that are at different temperatures. Energy is always transferred from the warmer object(which has a higher temperature) to the cooler one(which has lower temperature). Similarly, molecules with a lot of energy move faster than molecules with smaller amount of energy, thus causing the former to have more heat.
For example, an ice cube in a glass of water eventually melts.This is because, the heat from the water, which is warmer, flows to ice cube until both are at the same temperature, and therefore no ice cube is left.
When an ice cube is dropped into a cup of hot coffee, the heat flows from _________.
Heat is the transfer of thermal energy between that are at different temperatures. Energy is always transferred from the warmer object(which has a higher temperature) to the cooler one(which has lower temperature). Similarly, molecules with a lot of energy move faster than molecules with smaller amount of energy, thus causing the former to have more heat.
For example, an ice cube in a glass of water eventually melts.This is because, the heat from the water, which is warmer, flows to ice cube until both are at the same temperature, and therefore no ice cube is left.
