Pre Camcards Flashcards

1
Q

Formula for precentance effience

A
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2
Q

Mechanical Wave

A

NEEDS a MEDIUM

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3
Q
A

Diode

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4
Q

Absolute Presure

A
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5
Q

Newtons 1. law

A

An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force​

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6
Q

STP

A
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7
Q

Error Type?

A

Random Error

Reduced: By using avarge of multible measurements

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8
Q

A wave trough is

A

BølgeDAL

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9
Q

Force of Tension

A
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10
Q

Area under Displacement-Force curve shows

A

WORK in joules

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11
Q

Is the centripital force a fundamental force

A

NO

It most often is in the form of tension

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12
Q

Capacitance

A
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13
Q

Formel for x komponent i vektor

A
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14
Q

Formulas for constructive and destructive interference for 2 waves with equal frekvenses

A
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15
Q

Resistance Formula

A
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16
Q

Angular Displacement

A
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17
Q

Archimedes’ principle

A

“Every object is buoyed upwards by a force equal to the weight of the fluid the object displaces.”

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18
Q
A

Capicitor

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19
Q
A

Filament Bulb

  • Følger ikke Ohms lov
  • More current ⇒filament gets hotter⇒atoms vibrate more⇒more colisions with flowing electrons⇒increasing resistance
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20
Q

Magnetic Flux Desity

A
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21
Q

Hvor og hvorfor bruges en comutator

A
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22
Q

Ultimate Tensile strength

A
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23
Q

Electric Power

A
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24
Q

Formula for specific heat capacity c

A
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25
Q

Electric force FE between 2 charges

A
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26
Q

Elastic Colision

A

Total Ekin is conserved

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27
Q

Critical Damping

A
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28
Q

Formula for power displaced in a recister R

A
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29
Q

Fundemental Frequency

A

MINIMUM frequency of standing wave

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30
Q

Resistors in series circuits

A
  • Total resistance is equal to the sum of the individual resistances.
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31
Q

Direction of magnetic field

A

North to South

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32
Q

Why is high voltage used in power transmition

A

Consecvense of following formula

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33
Q

What holds Nucleus together

A

STRONG NUCLEAR FORCE

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34
Q

Electric Field Strength (E)

A
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35
Q

Lenz law is consecvens of

A

Conservation of ENERGY

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36
Q

Critical Angle

A
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37
Q

Factors affecting directions of an induced voltage

A
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38
Q

Magnetic Fields are resutls of …….

A

MOVING CHARGES

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39
Q

Behaviour of Alpha in magnetic field

A
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40
Q

Electric Charge

A
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41
Q

Work Energy priciple

A
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42
Q
A
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43
Q

Background radioation

A
  • Radon gas
  • Kosmic radiation (some get trough earths mag-field)
  • X-ray
  • Nuclear weapons testing
    *
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44
Q

Dopplerecffect formula for observed frekvency fo, when source moves

A

+ when source moves away

- when source moves towards

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45
Q

Which wave type needs a medium

A

LONGITUDINAL

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46
Q

Error Type?

A

Systematic Error

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47
Q

Tæller man displacement i formel for Epot, spring fra ny eller gammel hvile postion i følgende situation

A

Ny, hvis man ikke Egrav, pot

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48
Q

Resistors in parallel circuits

A
  • Individual resistances diminish to equal a smaller total resistance rather than add to make the total.
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49
Q

HIGH or LOW Thermal Conductivity

A
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50
Q

Electromagnetic Induction

A

Current can be induced to flow due to a CHANGING magnetic field

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51
Q

Total Internal Reflection

A
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52
Q

Formula for RESISTIVITY

A
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53
Q

Gauge pressure

A

Pressure measured relative to atmospheric pressure

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54
Q
A

First law of Thermodynamics

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55
Q

Superposition principle

A
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56
Q

Lift

A

Upward-acting force on an aircraft wing or airfoil.

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57
Q

Hvad er formlen for Amperes Law og hvad bruges den til

A
  • B at a distance r from a long straight wire carrying current I
  • µ0 er permeability of free space. B afhænger af ledningens materialle
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58
Q

Sammenhæng mellem angular velorcity og speed

A

Enhed for angular velorcity er radians/secound

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59
Q

Pefectly in-elastoc colision

A

MUST stick together after colision

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60
Q

Flemings RIGHT hand rule

A

DYNAMO EFFECT

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61
Q

Describe

A

0.6 V is THEASHOLD VOLTAGE

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62
Q

Important with this

A

Finger curled in direction of CURRENT

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63
Q

Current in parallel circuits

A
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64
Q

Gravertational Field Strength (g)

A
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65
Q

Lenz Law

A
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66
Q

Resistance: Impurities of metal, temperature

A
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67
Q

Factors affecting rate of conduction

A
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68
Q

Sammenhæng mellem Young’s modulus og k

A
  • A is area
  • L is nominal lenth
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69
Q

Particles affected by STRONG NUCLEAR FORCE

A
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70
Q

Paramagnetisk

A
  • Bliver magntisk ved pårvirkning af eksternt magnetisk feldt
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71
Q

Coulomb’s Law with permittivity of free space

A
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72
Q

Defernition of a wave

A

“A disturbance propagating through space”

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73
Q
A

Lamp

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74
Q

Thermal Radiation is what wave type

A
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75
Q

Formula for TERMINAL VELORCITY

A
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76
Q

Stress is defined as

A
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77
Q

Alpha Decay

A
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78
Q

Distinction between liquid and gasses

A
  • Gasses are compressible
  • Liquids are negligibly compressible​
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79
Q

Measurement close to true value

A

Accurate Measurement

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80
Q

What is this

A

Potential Divider Curcuit

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81
Q

CONVECTION FLOW

A
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82
Q

Relationship between wave lengh, frecvency and the speed of light

A
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83
Q

Strain is defined as

A
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84
Q

Radition Types

A
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85
Q

Voltage in parallel circuits

A
  • Voltage is equal across all components in a parallel circuit
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86
Q

Induced magnetism

A
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87
Q

Normal Force FN

A
  • Contact force
  • Always acts perpendicular to contact surface
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88
Q

What is REFRCTION and REFLECTION

A
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89
Q

Relationship between agular velocity and speed

A
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90
Q

Upon REFRACTION what is changed

  • Speed
  • Frekvency
  • Wave length
A
  • Speed CHANGES
  • Frekvency CONSTANT
  • Wave length CHANGES
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91
Q

What type of transformer is this

A

STEP-DOWN transformer

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92
Q

NEWTON’S SECOND LAW OF MOTION IN TERMS OF MOMENTUM

A
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93
Q

Responsible for beta day

A

WEAK NUCLEAR FORCE

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94
Q

Speed of sound

A
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95
Q

Potential Difference

A
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96
Q

Constructive and Destructive Interference

A
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97
Q

Formula for rotational kinetic energy

A
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98
Q

Formula for Magnetic Flux

A
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99
Q

Quarcs in hadrons

A
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100
Q
A

MELTING and BOILING

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101
Q

Equation for simple hamonic oscilation

A
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102
Q

Kinematic formula without vf

A
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103
Q

Specific Gravity

A

S.G is equal to % of object submerged

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104
Q

GAMMA DECAY

A
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105
Q

What are the 3 conservations in mechanics

A
  1. Conservation of Emek=Epot+Ekin ( in isolated system)
  2. Conservation of Momentum
  3. Conservation of Angular Momentum
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106
Q

Formel for y komponent i vektor

A
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107
Q

Where do we place the zero point of gravitational potential energy

A

Makes all values of the gravitational potential energy negative.

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108
Q

In-elastic colision

A

Total Ekin is NOT conserved

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109
Q

Electric Field (E)

A
  • Q1 creates E1E1 exerts force on Q2
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110
Q

Formula for the magnitude of the centripital acceleration ac

A
111
Q

Relative penetrating abilities of Alpha, Beta and Gamma

A
112
Q

The area under accelleration-time graph shows

A

Change in velorcity

113
Q

Formula for Fluid presure

A
114
Q

Maxwells RIGHT hand rule

A

Direction of Magnetic Field around a current carying wire

115
Q

Newtons 2. law

A
116
Q
A

Resistor

117
Q

Behaviour of Alpha, Beta and Gamma in a electric field

A
118
Q

PITCH relates to…….

A

Frekvency

119
Q
A

Ammeter

120
Q

Amplitude A defernition

A

“Maximum magnitude** of **displacement “

121
Q

Formula for TORQUE

A

Direction of TORQUE is find by right hand rule

122
Q

Formula for wave lenths at the n’th harmonic node for a standing wave

A

L is distance from start node to finish node (pipe lenth)

123
Q

Formula for Buoyant force

A

Because bottom of an object is always deeper in a fluid than the top of the object

124
Q

What type of transformer is this

A

STEP-UP transformer

125
Q

Only way to change speed of waves

A

Change the properties of the medium it travels in

126
Q

Kinematic formula without time

A
127
Q

Diffuse reflection

A
128
Q

Formula for momentum p

A

Momentum is a vector

129
Q

The limit of proportionality

A

Point beyond which Hooke’s law is no longer true

130
Q

Formula for impulse J

A

Impules is a vector

131
Q

What type of wave is sound

A

Longitudinal wave

Compresion wave

132
Q

Relationship between number of primary coils, secoundary coils, primary voltage and secoundary voltage

A
133
Q
A

Variable Resistor

134
Q
A
135
Q
A
136
Q

Antinode and node

A
137
Q

LOUDNESS relates to ……

A

AMPLITUDE

138
Q

Kinetmatic formula without displacement

A
139
Q

100% transformer efficiency and conservation of energy gives following formula

A
140
Q
A

DAMPED oscillations

141
Q

Planck’s equation

A

E: energy of the photon absorbed or emitted

f: frequency of the photon

h: is Planck’s constant, 6.626•10-34 J•s

142
Q

Relationship between Amplitude and Intensity

A
143
Q

Kinematic formula without acceleration

A
144
Q

Defernition of Terminal veloricity

A

Max v attainable by an object as it falls through a fluid

145
Q

NTC Thermistor

A
  • NTC stands for “Negative Temperature Coefficient”
  • Resistance decreases as temperature increases
146
Q

Difference between PD and EMF

A
  • PD is the work done in taking a unit charge from one point of the circuit to another
  • EMF is work done by a source in taking a unit charge round the complete circuit
147
Q

Energy Transfer

A
148
Q

Formula for specific charge of electron

A
149
Q

Centripital Force

A
150
Q
A

Cell

151
Q
A

Boyles Law

152
Q

Beta-_PLUS_ deay

A
153
Q

Current in series circuits

A

The amount of current is the same through any component in a series circuit.

154
Q

Place of node and antinode in half open pipe

A
155
Q

The conservations during radioactive decay

A
156
Q

Factors affecting magnitude of an induced voltage

A
157
Q

Range around measurement within true value is expected to lie

A

Uncertainty

158
Q

Behaviour of Beta-MINUS in magnetic field

A

Use Flemmings LEFT hand rule

159
Q

Internal Resistance

A
160
Q

Gravertational force FG between 2 masses

A
161
Q

Formula for center of mass

A
162
Q

Voltage in series circuits

A
  • Total Voltages is equal to the sum of all voltages
163
Q

Flemings Left hand rule

A

MOTOR EFFECT

and

FREE MOVING CHARGES IN B-FIELD

164
Q

Voltage

A
165
Q

Weight

A

Weight W is the force of gravity Fg exerted on an object

166
Q
A
167
Q

Pascal’s principle

A
168
Q

Relationship between agular displacement and distance

A
169
Q

LDR’s

A

Photo Resistors

  • LDR stands for light dependent resistors
  • In dark resistance is very _high_ (1M
  • Resistance decreases as the intensity of light they are exposed to increases
    *
170
Q

The area under velorcity-time graph shows

A

Displacement

171
Q

Drag

A

Modstand fx. luftmodstand, vandmodstand osv.

172
Q

Hooke’s Law

A
173
Q

“Specific”

A

Per unit mass

174
Q
A

Bridge Rectifier

175
Q

Formel for Fskrå på en skrå overflade

A
176
Q

Simple Harmonic Oscilator

A
  • Restoring force is proportional to displacement
  • Can be decribed with sine and cosine functions
177
Q

Average Power

A
178
Q

Vigtig Formula for gliding stopping due to friction

A
179
Q

Trick for pulley-table problems

A

Treating systems as single object

180
Q

Conservative Forces

A
  • Only depends on initial and final position
  • Eg. Gravitational and spring
  • NOT Drag or friction
181
Q

Natural Frequency

A
182
Q

Formula for Kinetic Energy

A
183
Q

What is this

A

Velorcity Selector

184
Q

What realtionship can be used instead of the formula of conservation of Ekin in problems with elastic colisions

A
185
Q

Snells Law

A
186
Q

If force i applied away from the center of mass of an object, then the object will

A

Rotate

187
Q

Defernition of EMF

A

Work done in driving unit charge around a complete circuit

188
Q

Formula for wave lenths of standing wave in half open pipe at n’th harmonic node

A
189
Q

Interpretation of output voltage graph

A
190
Q

Traveling distance of Decay in air

A
  • Alpha : 5 cm
  • Beta : 15 cm
  • Gamma : several meters
191
Q

Whar is the range of frekvencies the human ear can observe

A
192
Q

Formula for potential energy in a non-uniform gavitational field

A
193
Q

Place of Antinodes in open pipe

A
194
Q

Coherent Waves

A

Constant Phase Difference

195
Q

Repeated measurement is the same

A

Precise Measurement

196
Q

Determining wave lenth

A
197
Q

Magnetic Domains are due to

A

Unpaired elektron spin

198
Q

The angular velorcity in the equation of a harmonic movement for a sping is equal to

A
199
Q

Describe

A

Finding EMF and internal recistance

  • Mesure Terminal PD and corosponding I
200
Q

Formula for moment of inertia, when all mass is a same r

A
201
Q

Stokes Law

A
202
Q

Mass of alpha vs. electron

A

10 000 : 1

203
Q
A

Parallax Error

204
Q

Formel for static friction coeffitient µs

A
205
Q

CONDUCTION

A
206
Q

Formel for FN på en skrå overflade

A
207
Q

MOTOR EFFECT

A

Current carying wire experience force, when placed in a magnetic field

208
Q

Latent heat of fusion and Latent heat of vaporizartion

A
209
Q

Deffinition of a calorie

A

Energy needed to heat 1 g water 1 0C

210
Q

Work formula

A
211
Q

Period T defernition

A

Time required for an entire cycle

212
Q

Moment is the same as

A

TORQUE

213
Q

Formula for TOTAL MOMENT OF INERTIA

A
214
Q

Is kinetic energy a vector

A
  • No it is only a scalar
  • It is also ways positive
215
Q

Diffraction Equation

A
216
Q

What type of wave is light

A

Transverse wave

217
Q
A

Body executing SIMPLE HARMONIC motion

218
Q

Specular reflection

A
219
Q

Formula for NET impulse Jnet

A
220
Q

In perfect circular movement:

Velocity is……

Angular Velocity is …..

A

Velocity is changing

Angular Velocity is constant

221
Q

Mass

A

Mass m is a measure of the inertia of the object

222
Q
A

Evaporation

223
Q
A
224
Q

The steady current, delivering same average power as A.C

A

THE ROOT MEAN SQUARE

225
Q
A

Battery

226
Q
A

Voltmeter

227
Q

What is rarefaction

A

Det modsatte af compresion

228
Q
A

Work MUST be done to seperate atoms

229
Q

Formula for DRAG FORCE

A
230
Q

Magnetic Flux

A
231
Q

Field strengh general deferniton

A
232
Q

Formula for potential spring energy

A
233
Q

Problem causing reading to differ from true value

A

Error

234
Q

Directions of electric field lines

A
235
Q

Refraction Index

A
236
Q

CONVECTION

A
237
Q

Voltage is induced when ……..

A
  • Wire cuts fieldlines
  • Magnetic Field changes
238
Q

Perfect Diode

A
  • Acts like a perfect conductor when voltage is applied forward biased
  • Acts like perfect insulator when voltage is applied reverse biased.
239
Q

Definition of Current

A

Charge per time (ladning per tid)

240
Q

Torque acting clockwise is…….

A

NEGATIVE

241
Q

Elastic Limit

A

Minimal value of the stress which produces plastic deformation

242
Q

4 FUNDERMENTAL FORCES OF PHYSICS

A
243
Q

Defernition of FLUID

A

Fluids take shap of container

244
Q

Formel for kinetic friction coeffitient µk

A
245
Q

Behaviour of gamma in magnetic field

A
246
Q
A

Brownian motion

247
Q

AC

A

Alternating Curent (veksel)

248
Q
A

Acceleration in SIMPLE HARMINOC MOTION

249
Q

Young’s modulus

A

Measures the resistance of a material to being elastically deformed

250
Q

Newtons 3. law

A

If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.

251
Q

Beta-MINUS Decay

A
252
Q

Defernition of a PHOTON

A

The elementary particle, or quantum, of light

253
Q

Potential energy in uniform gravitational field

A
254
Q
A

Fixed Resistor

  • Følger Ohms lov
  • Antager konstant temperatur
255
Q

Instentanious Power

A
256
Q

Gravitational Potential

A

WORK pr. unit MASS bringing a MASS from infinity to the point

257
Q

Relativ ionising abilities of Alpha, Beta and Gamma

A
258
Q

DC

A

Direct current (jævn)

259
Q

Particles NOT affected by STRONG NUCLEAR FORCE

A
260
Q

Randomness of decay

A

Radioactive decay is a stochastic/random process at the level of single atoms. According to quantum theory, it is impossible to predict when a particular atom will decay

261
Q

Inetia

A
  1. Inertia is the tendency of an object to resist change in velocity​
  2. Inetia deppends on mass
262
Q

Dopplerecffect formula for observed frekvency fo, when observer moves

A

+ when obs moves towards source

- When obs moves away from source

263
Q

Lonzents Force Law

A
264
Q
A

Between State Change

265
Q

How is electromagnetic waves different from waves at sea

A

Consist of 2 waves oscillating perpendicular to one another

266
Q

Faradays Law of Induction

A
267
Q

Relationship between wave frekvency f and wave period T

A
268
Q

Potential Divider Equation

A
269
Q

What must the surface be in order to produce ECHO

A
  1. SMOUTH
  2. HARD
270
Q

Difference between scalars and vectors

A
271
Q

Sping constant from force and extention

A
272
Q

Ferromagnet

A
  • Permanent magnetisk
273
Q

The centripital force here is due to

A

MOTOR FORCE