physics p2

Question 1

how to find centre of mass question

Question 2

forces diagrams

Question 3

inertia mass

Question 4

limit of proportionality + hookes law

Question 5

what is spring constant

Question 6

what are plane waves

Answer 6

straight waves, move at same speed, keep same distance apart

Question 7

speed of sound waves

Answer 7

333 m/s

Question 8

speed of light waves

Answer 8

3 x 10^8

Question 9

what are carrier waves?

Answer 9

carrier waves = carry any type of signal

Question 10

How is a signal detected and transmitted?

Answer 10

1.An oscillator supplies carrier waves to a transmitter as an a.c
2. Audio signal is supplied to transmitter where it’s used to modulate carrier waves
3. modulated carrier waves are supplied to transmitter ariel –> varying a.c. supplied to aerial which causes it to emit radio waves that carry audio signal
4. when radio waves are absorbed by the receiver aerial, they induce an a.c. in it, causing oscillations in the receiver –> frequency of these oscillations is the same as the radio wave
5. receiver circuit separates audio signal from the carrier waves - audio signal is supplied to a loudspeaker –> sends out sound waves similar to those in the microphone

Question 11

convex, concave lenses

Question 12

ELECTROMAGENTICSM