The product of force and perpendicular M Ncm. The point beyond which a spring does not

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1 FORM 3 Sybol Unit Equation Definition / Meaning Law/Principle Denity kg/ 3, Ma per unit volue g/c 3 V Weight W N Force of gravity acting on a a Ma W = g The aount of atter (particle) in an kg, g object. Centre of gravity The point where the weight of an object ee to act. Moent N, The product of force and perpendicular M Nc ditance fro the pivot. Hooke law Moent = Force x perpendicular ditance When an object i in equilibriu the total clockwie and anticlockwie oent are equal. Extenion i directly proportional to load a long a the elatic liit i not exceeded. Elatic liit The point beyond which a pring doe not return to it original length once it i unloaded. Preure Pa, P N/ 2 F, P N/c 2 A Force per unit area. Preure in Pa, P liquid N/ 2 P = h g Work W J W = F Product of force and ditance oved. Kinetic Energy J K.E. = ½ v 2 Energy due to otion. Energy can neither be created nor detroyed but only E Potential Energy J P.E. = g h Energy due to height.. (gravitational) changed fro one for to another. Power Energy Rate of doing work. P W Power Tie Efficiency Efficiency = Output x 100% Input Teperature 0 C Heat Flow of energy caued by a difference in Q J Q = c teperature Specific heat capacity c J/kg 0 Q The energy required to raie the C c teperature of 1 kg of ubtance by 1 0 C Internal energy The kinetic and potential energy of the J particle that ake up atter. Light year The ditance oved by light in one year. Satellite A body that orbit a planet. Orbit The path taken by a planet while oving around a tar. Planet A body that orbit a tar, ha a nearly pherical hape and ha cleared the neighbourhood around it orbit. Mr. Neil Briffa Head of Departent Mota BSS Maria Regina College

2 FORM 4 Sybol Unit Equation Definition / Meaning Law/Principle Tranvere wave A wave in which the vibration i perpendicular (90 0 ) to the direction of the wave. Longitudinal A wave in which the vibration i wave parallel (180 0 ) to the direction of the wave. Periodic tie 1 The tie for one coplete wave. T T f Wavelength The ditance between two ucceive Frequency velocity aplitude diplaceent Reflection Diffraction Refractive index Real depth Apparent depth f c Hz, khz, MHz v = f cret or trough. The nuber of wave in one econd. v / The ditance oved per econd. c/ a The height of a cret or the depth of a c trough above ret poition. Overall change in poition and direction c of an object. The angle of incidence i alway equal to the angle of reflection. A phenoenon which occur when the gap width i equal or le than the wavelength of the wave. no unit c c Total internal reflection Diperion Focal length Magnification f c no unit Real depth Apparent depth hi ho v u A eaure of how uch the optical aterial i able to bend light. The depth at which an object iered in a liquid really i. The depth at which an object iered in a liquid appear to be. A phenoenon which occur when the critcal angle of the optical aterial i exceeded. The plitting up of white light into even different colour. The ditance between the principal focu and the len. A value which indicate by how uch an iage i enlarged or diinihed.

3 Average peed / c/ initial velocity final velocity acceleration/ deceleration ditance oved Thinking ditance Braking ditance u v a Total Ditance Average peed The average of all the peed which an Total tie object ha at different intance. / The velocity at the beginning of a tie c/ interval. v = u + at / v 2 = u 2 The velocity at the end of a tie + 2a c/ interval. = (u+v) t / 2 The rate of change of velocity. 2 c/ 2 = ut + ½at 2 c The ditance oved by a car while the driver i reacting. Total Ditance The ditance oved by a car fro the Average peed Total tie oent the driver tart braking until the car top. v = u + at Thinking ditance + Braking ditance Total topping ditance v 2 = u 2 + 2a Thinking tie t = (u+v) t The tie taken for the driver to react. Braking tie 2 The tie taken for the driver to top the t = ut + ½at 2 car after he tart braking. Total topping tie Accleration due to gravity Terinal velocity Newton 1 t law Newton 2 nd law Newton 3 rd law Inertia Moentu t g p Thinking tie + Braking tie / 2 = ½ g t 2 Acceleration of object falling freely and having no air reitance acting on the. / The axiu contant peed reached c/ by an object when the reultant force becoe zero. F = a The reluctance to change the tate of otion. kgc/ kg/ p = v The product of a and velocity. An object will continue to reain at ret or ove at contant peed unle there i an external force acting on it. Acceleration i directly proportional to the reultant force and inverely proportional to the a. OR The reultant force i the product of a and acceleration. For every action there i an equal and oppoite reaction. The total oentu before colliion i equal to the total oentu after provided that there are no external force.

4 Exploion Charge 0 = 1 v v 2 Q C Thi occur when two object eparate by oving in oppoite direction and have an equal and oppoite oentu. Q = It An aount of electron flowing. Current A I A V = I R The rate of flow of charge. Voltage V V = I R V V W = Q V kv Work per unit charge. Reitance V = I R R The oppoition to current flow. k Oh law Current i directly proportional to the voltage a long a the teperature reain contant. Ohic conductor A conductor that obey Oh law Nonohic A conductor that doe not obey Oh conductor law. Seiconductor A eiconductor i a ubtance, that can conduct electricity under oe condition but not other. Mr. Neil Briffa Head of Departent Mota BSS Maria Regina College

5 FORM 5 Sybol Unit Equation Definition / Meaning Law/Principle Direct Current A current which flow in one direction. Alternating A current which change direction every current half cycle. Rectification Changing a.c. to d.c. Fue A hort piece of wire which elt quickly when a high current flow, breaking the circuit to protect appliance. Earth A afety wire to prevent electric hock. Live A wire that carrie electricity fro the power grid. Neutral A wire that return electricity back to the power grid. Propertie of Attract only ferroagnetic aterial. agnet Ha agnetic pole. If upended it North pole point toward the agnetic North of the Earth. Right hand grip A rule ued to find the North pole of a rule Magnetic propertie of iron and teel Deagnetiing a peranent agnet Electroagnet Magnetic field Relay Fleing left hand rule Electroagnetic induction agnet or electroagnet. Iron i eaily agnetied and eaily deagnetied. Steel i hard to agnetie and hard to deagnetie. Haering Heating Uing alternating current Teporary agnet (iron) a long a current flow through it coil. The pace around a agnet where a ferroagnetic aterial experience a agnetic force. A echanical witch that i ued for afety purpoe. A rule that i ued to find the direction of the catapult force acting on a current carrying conductor in a agetic field.

6 Faraday law Lenz law The induced current i directly proportional to the rate at which the agnetic field line are cut. The agnetic effect of the current flowing through a coil oppoe the otion of the agnet oved in or out of it. Dynao Alternator Tranforer Ideal tranforer Energy loe in a tranforer Nucleon nuber Proton nuber Ion Iotope Alpha particle Beta particle Gaa radiation Detecting radioactive radiation Background radiation Background count rate Corrected count rate Halflife Ue of radioactivity d.c. generator. a.c. generator A device ued to decreae or increae an alternating voltage. A tranforer which ha no energy loe. Reitance of coil Eddy current. Leakage of field line. The nuber of proton and neutron in the nucleu. The nuber of proton in the nucleu. A charged ato. Ato of the ae eleent having the ae proton nuber but a different nucleon nuber. Conit of: Sybol Charge Range in air Stopped by Ioniing power: Heliu 4 nucleu 2 poitive 5 c paper, leave, oke, kin High Fat 0 oving negative Few etre 3 heet of aluiniu Low 1 electron Electroa everal c of lead gnetic neutral Infinite range wave Negligible GM tube and rateeter Photographic fil A natural for of radiation caued by air, rock and coic ray fro pace. The count rate due to background radiation. The count rate due to the ource only. The tie for half the ato to decay. Meauring thickne of aterial Carbon 14 dating Treatent of cancer

7 Mr. Neil Briffa Head of Departent Mota BSS Maria Regina College Trace underground leakage Soke alar Irradiation of food

The University of Akron Descriptive Astronomy Department of Physics. 3650: Exam #2 SVD 10/12/17

The University of Akron Descriptive Astronomy Department of Physics. 3650: Exam #2 SVD 10/12/17 The Univerity of Akron Decriptive Atronoy Departent of Phyic 3650:130-001 Exa # SVD 10/1/17 1. What phyical quantity i ued to deterine the aount of inertia an object ha? (a) force (b) a (c) weight (d)