Heat Transfer Videos

Poslední aktualizace 2 months ago

15 Dotazy

Knihovna

Heat Transfer Videos

Poslední aktualizace 2 months ago

15 Dotazy

Question 1

01:40

Question 2

02:33

Question 3

03:18

Question 4

04:52

Question 5

06:07

Question 6

00:27

Question 7

00:39

Question 8

00:50

Question 9

01:21

Question 10

00:31

Question 11

00:59

Question 12

01:36

Question 13

02:46

Question 14

03:10

Question 15

03:12

Question 1

01:40

Otázka 1

Why is cutting, folding, ripping, or cutting paper a physical change?

Because it makes a new substance.

Because it is still paper.

Because it makes the paper bigger.

Question 2

02:33

Otázka 2

If a change is reversible, it is a...

Physical change

Chemical change

Question 3

03:18

Otázka 3

What happens in a chemical change?

A new substance forms.

The substance stays the same.

It is very loud.

Question 4

04:52

Otázka 4

All chemical changes are...

Reversible

Irreversible

Question 5

06:07

Otázka 5

Why is baking cupcakes a chemical change?

Because the substances are exactly the same.

Because you cannot reverse the cupcakes back to the original ingredients.

Because they are delicious.

Question 6

00:27

Otázka 6

When heat transfer occurs by radiation, can things that are not touching the heat source become hot?

Yes

Question 7

00:39

Otázka 7

How does conduction make things hot?

By touching them.

By sending out rays of heat.

By hot gas or liquid rising.

Question 8

00:50

Otázka 8

What happens during convection?

Heat is transferred with touch.

Heat is transferred without touch.

Heat is transferred when a hot liquid or gas rises and a cool liquid or gas falls.

Question 9

01:21

Otázka 9

Does heat transfer only make things warmer, or can it make things cooler as well?

It only makes things warmer.

It can make things warmer or cooler.

Question 10

00:31

Otázka 10

10.

What happens when something heats up (the temperature increases)?

Its energy increases.

Its energy decreases.

Its energy stays the same.

Question 11

00:59

Otázka 11

11.

What kind of heat transfer requires direct contact?

Radiation

Conduction

Convection

Question 12

01:36

Otázka 12

12.

What kind of heat transfer involves a hot liquid or gas rising and then falling as it cools?

Radiation

Conduction

Convection

Question 13

02:46

Otázka 13

13.

What kind of heat transfer occurs without physical contact or touch?

Radiation

Conduction

Convection

Question 14

03:10

Question 15

03:12

Otázka 1

Why is cutting, folding, ripping, or cutting paper a physical change?

Because it makes a new substance.

Because it is still paper.

Because it makes the paper bigger.

Otázka 2

If a change is reversible, it is a...

Physical change

Chemical change

Otázka 3

What happens in a chemical change?

A new substance forms.

The substance stays the same.

It is very loud.

Otázka 4

All chemical changes are...

Reversible

Irreversible

Otázka 5

Why is baking cupcakes a chemical change?

Because the substances are exactly the same.

Because you cannot reverse the cupcakes back to the original ingredients.

Because they are delicious.

Otázka 6

When heat transfer occurs by radiation, can things that are not touching the heat source become hot?

Yes

Otázka 7

How does conduction make things hot?

By touching them.

By sending out rays of heat.

By hot gas or liquid rising.

Otázka 8

What happens during convection?

Heat is transferred with touch.

Heat is transferred without touch.

Heat is transferred when a hot liquid or gas rises and a cool liquid or gas falls.

Otázka 9

Does heat transfer only make things warmer, or can it make things cooler as well?

It only makes things warmer.

It can make things warmer or cooler.

Otázka 10

10.

What happens when something heats up (the temperature increases)?

Its energy increases.

Its energy decreases.

Its energy stays the same.

Otázka 11

11.

What kind of heat transfer requires direct contact?

Radiation

Conduction

Convection

Otázka 12

12.

What kind of heat transfer involves a hot liquid or gas rising and then falling as it cools?

Radiation

Conduction

Convection

Otázka 13

13.

What kind of heat transfer occurs without physical contact or touch?

Radiation

Conduction

Convection