Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Exam 1 Pg 1-65 Energy > Exsam 2 > Flashcards

Exsam 2 Flashcards

0
Q

All electrons are attracted to?

A

Protons

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

What is the charge of an electron?

A

Negative

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

If an atom or object losers electronIs, it becomes?

A

Positively charged

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

An electric current is made up of?

A

Electrons moving towards a place that is positively charged.

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

For an electric current to flow, what two systems are necessary?

A

A difference in charge between two object or places.

A path for the current to fall through.

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

Materials which allow an electrical current to easily flow through them are called?

A

Conductors

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

To keep an electric current in its pathway, the material through which it flows is surrounded by an?

A

Insulator

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

If there are no breaks in an electrical circuit, it is said to be be?

A

Closed

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

In a parallel circuit if one appliance it tuned off, what happens to the other appliances on the circuit?

A

The other appliances will not be affected

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

What is the major danger of a short circuit?

A

To much current may over heart the electrical wires and cause a fire

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

What affects the amount of current which flows through a circuit?

A

The electromotive force which makes the current flow through a path.
The resistance to the flow of electrons through the path.

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

What measures the flow of electric current through a circuit?

A

Amperes

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

What measures the resistance to the flow of electric current through a circuit?

A

Ohms

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

What measures the electromotive force which makes the current flow through a circuit?

A

Volts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What measures the power used by appliances?

A

Watts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Does a long, thin wire have grater resistance than a short m, think wire?

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

An increase in the resistance of a circuit reduces?

A

The current flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Does an increase in the voltage in a circuit reduce the current flow?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Does a 75 watt light bulb uses more power than a 40 watt light bulb

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Are both wet and dry cells change chemical energy into electrical energy?

A

Yes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

the electrode that electrons move towards in a wet it dry cell is call the?

A

Positive electrode

21
Q

In order for a dry cell to supply current, its inmates must be kept dry?

A

No

22
Q

When electric current flows through a wire, it creates a magnetic field around the wire.

A

True

23
Q

Does a generator changes electrical energy into a mechanical energy?

A

No

24
Q

Current which flows in one direction is called?

A

Direct current

25
Q

Does a generator produce direct current?

A

No

26
Q

Work is done when what kinda energy is changed into the energy of motion?

A

Potential.

27
Q

A child pulling a wagon down the street (is or is not) doing work.

A

Is.

28
Q

The push or pull which starts or stops motion is called?

A

Force

29
Q

Machines help make work easier by transferring or changing the direction of?

A

Force

30
Q

A machine can save?

A

Effort

31
Q

The ratio of useful work to the total work done by a machine is called?

A

Work load

32
Q

The efficiency of a machine is reduced by?

A

Friction

33
Q

A gasoline engine is more or less efficient than a turbine?

A

Less

34
Q

Bicycles are an example of what kinda machines?

A

Complex

35
Q

Solar energy (is or is not) difficult to store?

A

Is

36
Q

Water energy is harnessed by?

A

Turbines

37
Q

Do Internal combustion engines run on exploding gas?

A

Yes

38
Q

Under certain conditions, matter can be changed into energy, and energy changes In to?

A

Matter

39
Q

The nuclear reaction in which energy is released by the splitting of nuclei of heavy atoms is called?

A

fusion

40
Q

In atomic fission, crew chain reaction occurs because of?

A

fast moving neutrons

41
Q

Nuclear reactors currently obtain what energy from?

A

fission

42
Q

Fission is the nuclear reaction which uses the least expensive materials and produces the least amount of radioactive by- products?

A

False

43
Q

A centimeter is used to measure?

A

Length

44
Q

A kilogram is used to measure?

A

Weight

45
Q

The abbreviation g stands for?

A

Gram

46
Q

The abbreviation cm stands for?

A

Centimeter

47
Q

A liter a larger than a?

A

Milliliter

48
Q

A kilometer is larger than?

A

A meter & a millimeter

49
Q

A gram is smaller than?

A

Kilogram

50
Q

20 kilometers equals how many kilograms?

A

20,000

51
Q

6000 grams equals how many kilograms?

A

6

Exam 1 Pg 1-65 Energy (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions