"Internal Energy of Objects" Internal Energy and Heat Engine PPT Courseware 2

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"Internal Energy of Objects" Internal Energy and Heat Engine PPT Courseware 2

The internal energy of an object——

think

What factors determine the internal energy of an object?

The size of the mass and the temperature

Determine whether the following statements are correct?

As the temperature of an object increases, its internal energy increases ( )

The higher the temperature of an object, the more internal energy it has ( )

Water at 20°C must have less internal energy than water at 80°C ( )

The internal energy of an object at 0°C is also 0 ( )

An object placed at rest on the ground does not have any form of energy ( )

think about it

There is a piece of iron wire. In what ways can you increase its temperature? (Increase its internal energy)

A. Put it in the sun; B. Rub it on stones;

C. Put it in hot water; D. Put it on the fire;

E. Hit it with a hammer; F. Cover it with your hands

G. Repeatedly bend with force;

Two ways to change internal energy

※ Heat transfer ※ Work

Case Analysis

1. The way heat transfer changes the internal energy of an object

Iron wire absorbs heat and its internal energy increases; hot water releases heat and its internal energy decreases.

2. During the heat transfer process, there is a transfer of internal energy.

3. During the heat transfer process, the amount of internal energy change can be measured by the transferred heat.

In what ways do the following phenomena change the internal energy of objects?

When cutting wood with a saw, the saw blade gets hot.

Ice cubes in the sun melt quickly.

Use a hot water bottle to keep warm

Use a pump to inflate the bicycle. After a while, the wall of the pump will heat up.

What is heat

(1).Definition: During the heat transfer process, the amount of energy transferred is called heat

Represented by the symbol Q

(2).Unit of heat (Q):

The SI unit is the joule,

Summarize:

What did you gain today?

Any doubts?

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For more information about the PPT courseware "Internal Energy of Objects, Internal Energy and Heat Engines", please click on the PPT tab of "Internal Energy of Objects, Internal Energy and Heat Engines".

"Internal Energy of Objects" PPT courseware:

"Internal Energy of Objects" PPT courseware Part One: Learning Objectives 1. Understand the concept and units of specific heat capacity, and try to use specific heat capacity to explain relevant natural phenomena. 2. Understand the concept and unit of calorific value, and describe ways to improve fuel utilization efficiency. 3. Take a gasoline engine as an example...

"Internal Energy of Objects" PPT:

"Internal Energy of Objects" PPT Part One: Thermal Movement 1. Matter is composed of particles such as ________, ________ or ions. The particles that constitute matter never stop doing irregular ________. The __________________ inside an object is called heat transport..

"Internal Energy of Objects" Internal Energy and Heat Engine PPT Courseware 3:

"Internal Energy of Objects" Internal Energy and Heat Engine PPT Courseware 3 Knowledge Review Concepts of Kinetic Energy and Potential Energy The energy an object has due to its movement is called kinetic energy; the energy an object has due to being lifted up is called gravitational potential energy. The energy an object has due to elastic deformation It's called elastic potential energy. ..

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Update Time: 2024-07-03

This template belongs to Physics courseware Shanghai Science Edition Ninth Grade Physics industry PPT template

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