Physics p1 - OCR Higher teir 0.0 / 5 ? PhysicsAll p1GCSEOCR Created by: LavleenGillCreated on: 16-04-17 13:06 What is temperature? Heat of a particle. Measured in degrees. 1 of 31 What is Specific heat capacity? Energy to heat 1kg by 1 degrees. High - hard to heat, slow to cool 2 of 31 How to calculate energy using shc? ENERGY = MASS X SPECIFIC HEAT CAPACITY X TEMPERATURE CHANGE 3 of 31 What is latent heat? Energy to change the state of 1kg 4 of 31 How to calculate energy using latent heat? Energy = mass x latent heat 5 of 31 How is the change of state represented on a graph and how does it work? Horizontal line. - energy used to make/break intermolecular bond 6 of 31 What is conduction? Through solids. Hot particles vibrate, collide with neighbouring particles and pass on heat. 7 of 31 What is convection? Liquids and gases. Hot particles move around more, the material becomes less dense, and rises up. 8 of 31 What is radiation? Wave. Black absorbs and emits well, white reflects. 9 of 31 Why is air a good insulator? Particles are too far apart to pass on vibrations. 10 of 31 What is a thermogram? Picture which shows heat as colours. White/yellow/red = hot. Blue/black/purple = cold 11 of 31 What is the calculation payback time? INITIAL COST / ANNUAL SAVING 12 of 31 Explain why a hot air balloon rises in the air? Air particles spread out so it becomes less dense/lighter. 13 of 31 What are microwaves? Penetrate 1cm. Heat water and fat. Heat transferred to food by conduction. 14 of 31 What is infra red? Heat the surface. Heat transferred to food by conduction. 15 of 31 What is UV rays? Absorbed by melanin, darker skin has more melanin. Causes skin cancer. 16 of 31 What is the ozone? Absorbs UV, destroyed by CFCs. 17 of 31 What is refraction? Change in speed causes a change of direction. 18 of 31 What is diffraction? Waves spread out after passing through a gap. Maximum diffraction when the wave is the same as the gap. 19 of 31 What is amplitude? Half of the height of the wave. 20 of 31 What is frequency? Number of waves per second. 21 of 31 What is interference? 2 waves of similar frequency mix and distort. 22 of 31 What is analogue? Wave can have any value. 23 of 31 What is digital? Wave can be on or off. 24 of 31 4 properties of optical fibres? More information. Can be multiplexed. Better quality. Less affected by interference. 25 of 31 4 things about laser? Intense (low divergent). Coherent light. One colour. One wavelength 26 of 31 3 things about P waves? Longitudinal. Faster than an s wave. Travels through liquids and solids. 27 of 31 3 things about S waves? Transverse. Slower. Travels in solid only. 28 of 31 What is the outer core? Liquid. S waves cannot get through. 29 of 31 What is a seismometer? Detects/records seismic waves. 30 of 31 What are the 7 waves in the electromagnetic spectrum? Radio, Microwave, Infrared, visible, ultraviolet, x-ray, gamma. 31 of 31
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