07112021

Question 1

pressure in a cylinder =

Answer 1

height * density of liquid * gfs (p=hρg)

Question 2

(final velocity) ^2 - (initial velocity)^2 =

Answer 2

2 * acceleration * distance (v2 - u2 = 2as)

Question 3

force = (in terms of momentum)

Answer 3

change in momentum/time taken (F=Δmomentum/Δt)

Question 4

elastic potential energy =

Answer 4

0.5extentionspring constant (Ee=1/2ke^2)

Question 5

change in thermal energy=

Answer 5

mass * heat capacity * temperature change (ΔE=mcθ)

Question 6

time period=

Answer 6

1/frequency

Question 7

magnification=

Answer 7

image size / object size

Question 8

force on a conductor=

Answer 8

magnetic flux density * currant * length (F=BIL)

Question 9

potdif over primary coil / potdif over secondary coil =

Answer 9

number of turns in primary coil / number of turns in secondary coil (vp/vs = np/ns)

Question 10

potdif over primary coil * current in primary coil=

Answer 10

potential difference across secondary coil * current in the secondary coil (Vp *Ip=Vs *Is)

Question 11

pressure * volume (in a gas)

Answer 11

constant (P1V1=P2V2)

Question 12

thermal energy for a change of state =

Answer 12

mass * specific latent heat (E = mL)