paper 6

Question 1

why is it good practice to read thermometer scale at right angles

Answer 1

to avoid parallax error owtte

Question 2

how do you display results to make it easier to see a trend

Answer 2

plot a graph
need to mention what is x value and what is y
eg. temperature against time graph

Question 3

what is the distance pins must be for a ray diagram

Answer 3

at least 5 cm apart

Question 4

what preucations you would take in order to produce accurate ray trace

Answer 4

sharp pencil, thin line
place pins as far away from each other as possible
ensure you view bottom of pins

Question 5

what do you call results which arent exactly equal but should be

Answer 5

they are in the limits of experimental accuracy

Question 6

suggest a preucation to obtain an accurate reading of volume of water in a measruing cylinder

Answer 6

view water at bottom of miniscus
ensure measuring cylinder at horizontal surface

Question 7

suitable set of readings student should take

Answer 7

5-15

Question 8

explain brefily how graphical method can give more accurate results

Answer 8

way of taking an avergae
anomolous results seen

Question 9

how should you view a water volume from measuring cylinder

Answer 9

perpindicular to the scale
line with bottom of meniscus

Question 10

whythe mixture of hot and cold water mixed before taking temp

Answer 10

To obtain even temperature throughout owtte

Question 11

preucations lens experimnet

Answer 11

lens and screen upright/
darkened room
move lens slowly
make sure object and lens same height