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Physics, d, P4, d - Coggle Diagram
Physics
P3
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Gravitational potential
Gravitational potential energy (J) = mass (kg) x gravitational field strength
(N/kg) x vertical height from ground (m)
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Law of conservation of energy: Energy can not be created or destroyed, only transferred from one store to another
Efficiency- The efficiency of a device is the proportion (%) of energy transferred into useful forms
Efficiency formula- Efficiency (%) = (useful energy transferred by the device / total energy supplied to
the device) x 100
There are three ways energy is transferred conduction, convection and radiation
P5
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Waves at a boundary - When waves travel from one medium to another, their speed and wavelength change but their frequency stays the same.
Frequency is unchanged - The frequency of the wave does not change because the source is producing the same number of oscillations (vibrations) per second.
Refraction of light - Light is refracted when it travels from one medium to another and changes speed.
EM spectrum
William Herschel discovered infrared radiationby using prims to split up the sunlight ino a spectrum of colors. He then placed thermometers to see which colour had the most heat. He discovered that violet had the lowest temperature and that red was the highest but was then surprised that outside the boundary of the red was even hotter.
P1 and P2
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Acceleration
Acceleration is the change in velocity in a certain amount of time
You can find average acceleration using: A = (v-u) / t
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