Physics Y09 Autumn 2022/23 Flashcards
1.1 List the eight ways energy can be stored by objects
Kinetic, gravitational potential, elastic, chemical potential, thermal, nuclear, electrostatic and magnetic.
1.2 List the four ways energy can be transferred by objects
Mechanical, heating, radiation and electrical.
1.3 Define the term disspated energy
Wasted energy that is transferred to the surroundings, usually as thermal energy or sound radiation.
1.4 Define the term power.
It is the rate at which energy is transferred.
1.5 Name six renewable energy resources and four non-renewable energy resources.
Renewable: solar, wind, hydroelectric, wave, tidal, biofuels, geothermal. Non-renewable: coal, oil, gas, nuclear.
1.6 Describe the difference between renewable and non-renewable energy resources.
Non-renewable energy resources will run out. Renewable energy resources will not run out and can be replenished easily.
2.1 Describe the difference between a longitudinal and a transverse wave.
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.
2.2 Describe the difference between an electromagnetic and a mechanical wave.
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.
2.3 Define the term frequency.
The number of waves that pass a point in one second.
2.4 List the EM waves in order from longest to shortest wavelength.
Radio, microwave, infra-red, visible, ultra-violet, x-ray, gamma.
2.5 List the three EM waves that are ionising.
Ultra-violet, x-ray and gamma.
2.6 State the uses of microwaves.
Satellite communication (as they can travel through ionosphere) and for cooking food.
2.7 State the uses of visible light.
Fibre optic communications, vision.
2.8 State the danger of ultraviolet radiation.
Increased risk of SKIN cancer.
3.1 State the equation that links volume, mass and density.
Density = mass ÷ volume.