Circular motion and Thermo

Question 1

how to calculate density

Answer 1

p=m/v
p=density
m=mass
v=volume

Question 2

How to calculate linear motion of smt goin in a circle

Answer 2

V = (2πr)/T
r= radius(m)
T=period in seconds

Question 3

how to calculate angular velociy

Answer 3

v= ωr
(hence)
v = (2πr)/T
if in radians
T = period in seconds

Question 4

centripetal acceleration

Answer 4

a= v²/r

Question 5

centripetal force

Answer 5

F=(mv²)/r

Question 6

kinetic energy of particles

Answer 6

Ek=(3/2)KbT
kB=Boltzmann constant
T=Kelvin

Question 7

Centripetal force for planets and shit

Answer 7

F = (GMm)/r²
G = gravitational constant
M = mass of the thing that its attracted to (i.e satellite to the Earth, this would be the Earth)
m=would be the mass of the satellite following the example
r = distance between centre of earth and satellite

Question 8

energy stored / released as the temperature changes

Answer 8

Q = mcΔ T
c = specific heat capacity
Δ T = change in temperature

Question 9

energy required to change state (when the temperature stays the same

Answer 9

Q= mL
L = specific latent heat of vaporization or fusion
Lv = boiling
Lf = melting

Question 10

Rate of thermal energy transfer

Answer 10

(Δ Q/Δ T) = -kA(Δ T/Δ x)
Q = change in energy
t = change in time
k = thermal conductivity of the object
A = area of the object that heat is transferring
T = temperature
x = long distance over which the conduction takes place