Revision

Question 1

Youngs modulus =

Answer 1

stiffness = springs constant = k

Question 2

Absolute uncertainty is always

Answer 2

+/-

Question 3

Extrapolation is

Answer 3

innacurate

Question 4

Vernier callipers x.ymm

Answer 4

x = value just before where 0 is
y = where two lines meet up

Question 5

Smaller measurements - uncertainties

Answer 5

Less absolute uncertainty but more percentage uncertainty

Question 6

Fringe spacing for a single slit =

Answer 6

2Dlambda/a

Question 7

Diffraction grating equation =

Answer 7

dsinX = nlamba

Question 8

Constant y or x then graph is

Answer 8

linear

Question 9

SinX =

Answer 9

amount of diffraction = fringe spacing

Question 10

Efficiency =

Answer 10

output/input (rate of transfer)

Question 11

0electron1 =

Answer 11

-1electron0

Question 12

Lost volts =

Answer 12

emf - V = switch open - switch closed

Lost volts/current = internal resistance

Question 13

Watts =

Answer 13

Joules/second

Question 14

Power =

Answer 14

Energy/time

Question 15

If go back to start point then displacement = 0 so

Answer 15

velocity = 0

Question 16

Average speed =

Answer 16

total distance/total time

Question 17

Time of flight =

Answer 17

Time up * 2 = time down * 2
Time up = time down
time up + time down

Question 18

Rate of power lost =

Answer 18

rate of voltage lost

Question 19

Adding a resistor in parallel causes

Answer 19

a decrease in the total resistance

1/Rt = 1/R1 +1/R2 + 1/R3

Question 20

Q =

Answer 20

number of electrons * charge

Question 21

emf =

Answer 21

V + I(r)

Question 22

Intensity =

Answer 22

power/area

Question 23

Reversing cells

Answer 23

cancelling 2 when 1 reverses

Question 24

no. of lines =

Answer 24

1/spacing

Question 25

V1/V2 =

Answer 25

R1/R2

Question 26

Upon impact momentum =

Answer 26

0

Question 27

Diameter of atom =

Answer 27

10^-11

Question 28

Minimum distance of wave =

Answer 28

1st harmonic –> L=0.5lambda

Question 29

As temperature increases in a thermistor what happens to its conducting capabilities

Answer 29

Resistance decreases so current increases so conducts more like a superconductor

Question 30

Strangeness of K+

Answer 30

1

Question 31

Strangeness of K-

Answer 31

-1

Question 32

Strangeness of K0

Answer 32

1

Question 33

Strangeness of antiK0

Answer 33

-1

Question 34

Vernier caliper -

Answer 34

check jaws for zero error

Question 35

Micrometer =

Answer 35

0. 5mm resolution

0. 1*xmm where lines meet up

Question 36

How to reduce parallex error

Answer 36

Move ruler closer to whats being measured and make sure the eye-view is in line with the measurement in order to reduce it

Question 37

Average velocity and acceleration with light gate

Answer 37

Use on card for velocity and two for acceleration

Question 38

Vernier scale =

Answer 38

value just before 0 + where lines meet up again

Question 39

Ruler absolute uncertainty =

Answer 39

2*0.5mm=+/- 1mm

Question 40

Time absolute uncertainty =

Answer 40

+/-0.2s

Question 41

Voltmeter measures

Answer 41

Change in voltage = potential difference

Question 42

Name a particle that is difficult to detect

Answer 42

Neutrino

Question 43

Conservation of energy states

Answer 43

Energy cannot be destroyed only ever transfered

Question 44

Progressive waves’ traits

Answer 44

Transfers energy from one point to another without transferring material

Question 45

Moment =

Answer 45

Force*perpendicular distance from line of action to pivot point

Question 46

Electron capture =

Answer 46

Orbital electron and proton in nucleus forming a neutron and releasing a neutrino

Question 47

Couple =

Answer 47

A pair of equal and opposite forces acting on a body but not alone the same line