Physics syllabus notes, Lecture notes of Physics

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5.2 Radioactivity continued 5.2.5 Safety precautions Core 1 State the effects of ionising nuclear radiations on living things, including cell death, mutations and cancer” 2 Describe how radioactive materials are moved, used and stored in’ ci sateen ahem seu eth etnartet ang inten tithe anne Aadaacsve sma aad be mare saree — cre + manure et aes acer 3 dorama erpenica! Sos 5 lawataen (reeset 6 Space physics 6.1 Earth and the Solar System 611 THE FRR, iy sate ttre bnoe vas tena Aa hi ey hs ln) bal a Cte) Know that the Earth is a planet that rotates on \ its axis, which is tilted, once in approximately 24 hours, and use this tojexplain observations | 1 of the apparent daily motion of the Sun and the] \periodic cycle of day and night 2 Know that the Earth orbits the Sun once in approximately 365 days and use this to explain the periodic nature of the seasons 3 Know that it takes approximately one month for the Moon to orbit the Earth and use this to explain the periodic nature of the Moon's cycle of phases en waslema! ale tr eok toe oe aegis eon Supplement 3 Explain safety precautions for all ionising radiation in terms of reducing exposure time, increasing distance between source and living ical 4 Define average orbital speed from the equation _2ar _T where ris the average radius of the orbit and Tis the orbital period; recall and use this equation 25 rd tan = ote Tathe fag 4 at. ~ 10,000 te f wn 4 ch —s one tm r * ws estat i ed Et ta gnOe 3.4 Sound c j omgaaueeeeyi Supplement Describe a method involving a Penney ‘\\._ distance and time for determining the pees of’ conte “Sound in air a Be tuler at om 7 Describe how changes in amplitude and ' ‘my frequency affect the loudness.and pitchofsound 1); | 1 1 Wy waves : 8 Describe an echo as the reflection of sound waves ss = io 9 Define ultrasound as sound with a‘frequency 12. Describe the uses of ultrasound in non- ier than 20 kHz destructive testing of materials, medical scanning Normal hesring of soft tissue and sonar including calculation of depth or distance from time and wave speed Infeasird|20%2 5 22,00 WY aasons ‘ eat bt heard” + Np ted, wo bows pete Rage” sere ee ’ 4 sien and a Caporstte t wi Ut did Ee ah, “Be vvediar x ad fwd Sot ace bore g 2 ie Soest aw deat oe eet sancumentstre 10. Explain that magnetic forces are.due.to. Mose, hewmen al and ihicanmorntenraecie including the use of the terms north pole (N pole), south pole (S pale), attraction and 3 State the differences b between the properties of temporary magnets (made of soft iron) and the ss Ti Know that the relative strength of amagnetic lines around a bar magnet field is represented by thespacing ofthe 7 State that thedirection of a magneticfield at a point is the-direction of the forceon the'N pole 5 of amagnet at that point eatin 8 Describe the plotting of magnetic field lines “7.2 a Hynuing proce Wee ee eee eee as. ; pee geil ae 5 Tiledaalee. Se 14 nam poms rai 2 an (lop ll ek ee hammering mgedtdly or hme: papal le: sd ugg. = rane tality cease cnet apchally Lead < to contents page 3 1 www. cambridgeintemational org/igese 2s