PHY3209: Exercise 3 List the forms of energy that contribute to the intemal ener
ID: 1585766 • Letter: P
Question
PHY3209: Exercise 3 List the forms of energy that contribute to the intemal energy of a system, 2How are heat. nternal energy, and themnal energy related to each other? 3What is mechanicalenergy? How does it der from thermal energy? What ane the foms of mechanical energy of a fuid stream Portable eleciric heaters are commonty used to heat smal rooms Explain the energy transfomation involved during this heating process telow the free H is deter- to collect a nver hat weighs 45 kg wi Figure 1 Foure 2
Explanation / Answer
1. Types of energy that contribute to internal energy are
a. vibrational energy of molecule
b. rotational enrgy of molecuule
c. heat content
d. potential energy
e. rest mass energy etc.
2. Heat is defined as thermal energy in flow whereas stored thermal ennrgy is called internal energy
3. Mechanical energy is sum of kinetic energy and potential energy where as thermal energy is heat stored by a object and it is a type of internal energy.
Mechanical energy is mainly devided in two part for fluid 1.kinetic energy
2. Potential energy
4. in portable room heater first electrical energy is converted to heat energy than this heat energy is transfered to the room environment where it is stored as a thermal energy.
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