Physics Y09 Autumn 2022/23 Flashcards

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1
Q

1.1 List the eight ways energy can be stored by objects

A

Kinetic, gravitational potential, elastic, chemical potential, thermal, nuclear, electrostatic and magnetic.

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2
Q

1.2 List the four ways energy can be transferred by objects

A

Mechanical, heating, radiation and electrical.

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3
Q

1.3 Define the term disspated energy

A

Wasted energy that is transferred to the surroundings, usually as thermal energy or sound radiation.

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4
Q

1.4 Define the term power.

A

It is the rate at which energy is transferred.

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5
Q

1.5 Name six renewable energy resources and four non-renewable energy resources.

A

Renewable: solar, wind, hydroelectric, wave, tidal, biofuels, geothermal. Non-renewable: coal, oil, gas, nuclear.

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6
Q

1.6 Describe the difference between renewable and non-renewable energy resources.

A

Non-renewable energy resources will run out. Renewable energy resources will not run out and can be replenished easily.

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7
Q

2.1 Describe the difference between a longitudinal and a transverse wave.

A

In a longitudinal waves, the oscillations are parallel to the direction of the energy transfer. In transverse waves, the oscillations are perpendicular to the direction of the energy transfer.

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8
Q

2.2 Describe the difference between an electromagnetic and a mechanical wave.

A

A mechanical wave is one that transfers energy through vibrating particles in matter. An electromagnetic wave is one that does not need particles to travel so it can travel through a vacuum.

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9
Q

2.3 Define the term frequency.

A

The number of waves that pass a point in one second.

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10
Q

2.4 List the EM waves in order from longest to shortest wavelength.

A

Radio, microwave, infra-red, visible, ultra-violet, x-ray, gamma.

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11
Q

2.5 List the three EM waves that are ionising.

A

Ultra-violet, x-ray and gamma.

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12
Q

2.6 State the uses of microwaves.

A

Satellite communication (as they can travel through ionosphere) and for cooking food.

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13
Q

2.7 State the uses of visible light.

A

Fibre optic communications, vision.

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14
Q

2.8 State the danger of ultraviolet radiation.

A

Increased risk of SKIN cancer.

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15
Q

3.1 State the equation that links volume, mass and density.

A

Density = mass ÷ volume.

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16
Q

3.2 Describe the arrangement and movement of particles in a solid.

A

The particles are touching and vibrate around a fixed pattern.

17
Q

3.3 Describe the arrangement and movement of particles in a liquid.

A

Particles are touching but not in fixed positions. They are free to flow around.

18
Q

3.4 Describe the arrangement and movement of particles in a gas.

A

Particles are far apart and move around quickly and randomly.

19
Q

3.5 List the names of the five state changes.

A

Melting (solid → liquid), evaporating (liquid → gas), freezing (liquid → solid), condensing (gas → liquid), sublimating (solid → gas/gas → solid).

20
Q

3.6 Define internal energy.

A

Internal energy is the total kinetic energy and potential energy of all the particles that make up a system.