Experiments Flashcards

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1
Q

Latent heat of fusion of Ice

A

Mass of ice was found by (Mc + Mw+ Mi) - (Mc + Mw)
Crushed ice that was melting
Insulated by having wool around it to stop conduction and a lid to stop convection
thermometer has a low specific heat capacity and is precise

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2
Q

Apparatus of SMH exp

A

Rhetort stand, string, wooden blocks, bob, timer, metre stick

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3
Q

Why 20 oscillations

A

DIminshes human error therefore greater accuracy to your result

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4
Q

Graph SHM

A

T over 20 then squared
L(m)
Tsquared = 4 pie squared root l over g

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5
Q

Frequency to tension diagram

A

sonometer, 2 bridges, piece of paper, string, newtonmeter, tensioner, tuning fork

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6
Q

Frequency to tension method

A

Keep string length constant then place a tuning fork one the sting at the bridge, increase the tension until your paper flies off this is the the tension for that frequency.

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7
Q

F - T Graph

A

f = 1 over 2l root T over miu

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8
Q

PCM diagram

A

Track, 2 trolleys, velcro, light gates, retort stand

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9
Q

How friction and gravity was minimised

A

By increasing the slope of the track so that the weight of the trolley acting down the slope was equal to the friction acting up cancelling them out

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10
Q

How friction and gravity was minimised

A

By increasing the slope of the track so that the weight of the trolley acting down the slope was equal to the friction acting up cancelling them out

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11
Q

PCM calculations

A

m1u1 + m2u2m =(m1 +m2)v don’t equal; I=until the end

p=mv v = s over t

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12
Q

(Refractive index) How angle of refraction was found

A

Shine light ray through glass box at angle theta
mark two points on incidence ray and refracted ray
then remove box and connect the dots
draw normal to theta
Then measure the angle with protractor form normal to ray in the box

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13
Q

(Refractive index) graph

A

sin i over sin r

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14
Q

(Acceleration due to g) diagram

A

Rhetort stand, pincers, metal ball, pressure pad, cables, timer,

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15
Q

(Acceleration due to g) between which points was s measured

A

bottom of ball to top of pressure pad

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16
Q

(Acceleration due to g)How t was measured

A

The timer started when the ball was released and was stopped when it hit the pressure pad

17
Q

(Acceleration due to g) graph

A

s over t squared

2(m)

18
Q

(Acceleration due to g) small dense ball

A

less air resistance

19
Q

(Monochromatic light) labelled diagram

A

Spectrometer, diffraction grating, sodium lamp

20
Q

(Monochromatic light). how angle between n-= 1 was found

A

record theta r at n=1
record theta l at n=1
minus them

21
Q

calculate wavelength

A

nlamba=dsintheta

22
Q

(laws of equilibrium) centre of gravity was found

A

suspending the ruler with a string , wherever the string lies, when the ruler stays suspended in the air is your centre of gravity

23
Q

(laws of equilibrium) weight of metre stick

A

suspending it with 2 newton meters

24
Q

(laws of equilibrium) net force =

A

up forces - down forces

25
Q

(laws of equilibrium) sum of moments

A
clockwise = anticlockwise 
moment = w by distance from centre of gravity
26
Q

(Boyles law) diagram

A

pressure gauge
volume scale
compressor

27
Q

(Boyles law) method

A

decrease presuure and record volume

28
Q

(Boyles law) graph

A

p inversely proportional to v