3.1-3.12 Efficiency and Energy Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What is meant by conservation of energy?

A

The total energy of an isolated system remains constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What energy changes occur when an object travels is projected upwards?

A

Kinetic Energy transferred to GPE and vice versa as it comes back down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the 8 energy stores?

A
.Magnetic
.Thermal
.Chemical
.Kinetic
.Electrostatic
.Elastic potential
.Gravitational potential
.Nuclear
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What energy changes occur when an object travels up a slope?

A

.KE transferred to GPE and heat if friction is present

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What energy changes occur if a moving object hits an obstacle?

A

.KE transferred to sound

.KE transferred to obstacle if that moves to

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What energy changes would occur if an object is accelerated at a constant force?

A

.Object is having work done to it with gaining KE

.Whatever supplies the force is having its Energy transferred to KE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What energy changes occur to a vehicle slowing down?

A

KE transferred to heat (through breaks)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What energy changes occur through boiling water in a kettle?

A

.Electrical energy to thermal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What happens to the net change if energy transfer occurs in a closed environment?

A

.No net change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Give two ways efficiency can be increased through waste output

A

.Lubrication

.Thermal insulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

If the thickness of the walls in a business are increased what happens to the heat loss?

A

.Greater thermal insulation so heat loss decreases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How do air cavities cause heat loss?

A

.Heat loss by convection, fills in the gap and prevents air flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How can efficiency be increased?

A

.Reducing waste output

.Recycling waste output

How well did you know this?
1
Not at all
2
3
4
5
Perfectly