required pracs p2

Question 1

equiptment for required prac extenesion

Answer 1

• clamp stand w weight on to hold down
• clamps
• boses
• spring with hooden splint marker attached to one clamp
• ruler attacehd parralel at zero vertically to the spring

Question 2

required prac extension

Answer 2

• read posiiton of the unstretched spring on metter rule
• add 1n weight and measure again
• repeat adding 1n weight every time
• find extension for every weight by taking initial unstretched off total
• plot graph of extension and weight

Question 3

equiptment for required prac car

Answer 3

-toy car attached to string attached to pulley attached to weight
- desk w chalk lines at intervals
-stop watch and/or phone

Question 4

required prac car

Answer 4

• hold onto the car and release
• record time car takes to pass the intervals
• recrease mass on string and increase mass on car so mass stays constant whilst weight changes
• repeat with differnt masses on the string

Question 5

ripple tank equiptment

Answer 5

• ripper tank with water
• paper at boottom
• vibrating gen attached to power pack
• lamp overhead
• phone, stopwatch and ruler

Question 6

ripple tank prac

Answer 6

• place ruler on tak and take photo so you can count the size of one wavelegth
• film number of waves passing in ones second/ te divided by ten- and that is frequency
• calculate speed by freq times wl

Question 7

waves through matter equiptment

Answer 7

-string one end attached to vibrator one to mass to keep taught
- vibrator attached to generator which can changethe freq

Question 8

waves through matter experiment

Answer 8

• increase in freq will produce one standing wave
• we ca measure it to get wl and hence wave speed
• conintual increase will create more waves

Question 9

four surfaces of a leslie cube i order of most infared

Answer 9

matte black, shiny black, white, metalic

Question 10

how to record amount of infared

Answer 10

• infared detector
• black thermometer though this has a lower res

Question 11

steps to testing the infared absorption of something

Answer 11

• 2 metal plates veritical w an infared heater in the middle and a vaseline attached pin on the two outisde sides
• turn on heater
• record time taken for pin to fall out of vaseline due to heat
• black is most absorptive so will fall first