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Science > Physics Gr.10 T2 sound waves, electromagnetic radiation, magnetism, electrostatics > Flashcards

Physics Gr.10 T2 sound waves, electromagnetic radiation, magnetism, electrostatics Flashcards

1
Q

What are longitudinal waves?

A

Particles in a medium oscillate in directions parallel to the direction that the wave is traveling.

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2
Q

What are sound waves?

A

Longitudinal waves that result from the vibration of objects (pressure waves).

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3
Q

What do sound waves travel best through?

Solids
Liquids
Gases

A

Solids

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4
Q

On what can sound waves be shown?

A

An oscilloscope

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5
Q

What is pitch?

A

How high or low a note is

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6
Q

What is loudness?

A

Amplitude is a measure of the pressure changes

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7
Q

What is the audible range?

A

20 Hz-20 000 Hz

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8
Q

What is a musical note?

A

Sound caused by regular vibrations

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9
Q

What is noise?

A

Irregular vibrations with a mixture of different frequencies.

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10
Q

What is ultrasound?

A

“Beyond” sound

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11
Q

Why does electromagnetic radiation have wave particle duality?

A

Sometimes behaves like a wave and sometimes behaves like a particle.

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12
Q

What is the origin of electromagnetic radiation?

A

Charges are accelerated and this causes alternating electric and magnetic fields, which form perpendicular to each other.

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13
Q

Which 3 elements are ferromagnetic materials?

A

Cobalt (Co)
Nickel (Ni)
Iron (Fe)

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14
Q

What is a magnetic field?

A

A region in the space around a magnet where other magnets will experience a force.

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15
Q

What causes magnetic storms?

A

The distortion of the earth’s magnetic field by solar winds of charged particles.

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16
Q

What causes auroras?

A

Charged particles in solar winds are trapped in the Earth’s field lines and collide with gases in the ionosphere, causing them to be energized and glow.

17
Q

What is an insulator?

A

An object that is charged by rubbing. Charges accumulate on the surface. Charges are not free to move.

18
Q

What is a conductor?

A

An object where charges are mobile.

19
Q

What is polarisation?

A

To make charges on a neutral object separate by bringing a charged object closer.

20
Q

What is the symbol and unit of electric charge?

A

Symbol: Q
Unit: C (coulomb)

21
Q

What is the name of this formula?

Q+Q
   1   2 Q=➖➖
     2
A

Th law of conservation of charge.

22
Q

What is the name of this formula?

Q=nq
e

A

the principle of quantisation

23
Q

What is the magnitude of a charge?

A

-19

1,6x10 C

24
Q

What is the law of electric charge?

A

The net charge of an isolated system remains constant during any physical process.

25
Q

What formula is the law of conservation of charge?

A

Q+Q
1 2
Q=➖➖
2

27
Q

What formula is the principle of quantisation?

A

Q=nq

e

28
Q

What are the 2 stages of these waves called?

1) transverse wave
2) longitudinal wave

A

1) crest and trough

2) compression and rarefaction

Science (19 decks)

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