Answer:
, 
Explanation:
The magnitude of the electromagnetic force between the electron and the proton in the nucleus is equal to the centripetal force:
where
k is the Coulomb constant
e is the magnitude of the charge of the electron
e is the magnitude of the charge of the proton in the nucleus
r is the distance between the electron and the nucleus
v is the speed of the electron
is the mass of the electron
Solving for v, we find
Inside an atom of hydrogen, the distance between the electron and the nucleus is approximately
while the electron mass is
and the charge is
Substituting into the formula, we find
Answer:
Pencil is to pen
Step by step explanation:
They are similar items, as they are both tools, but are different as to how they function.
M = 150 kg.
Final velocity, v = 14 m/s
Initial Velocity, u = 6 m/s
Impulse = m(v - u)
= 150*(14 - 6)
= 150*8 = 1200 kgm/s or 1200 Ns
Answer:
a true
Explanation:
Water has the high specific heat capacity.
That means it resists to change its temperature when a considerable amount of heat lost or gained
4200J is needed to raise the temperature of 1kg substance by 1 degree Celsius
Answer:
Cs=912.6J/kg/K
Explanation:
Sum of Heat gained=sum heat lośs
Definition of terms
Ms=mass of substance 0.11kg
Cs=specific heat capacity of the substance?
Ts= temperature of the substance
Tm= temperature of mixture 28.8°C
Tal= temperature of aluminium19.6°C
Tw=temperature of water 19.6°C
Mal=mass of aluminium 0.172kg
Mw=mass of water 0.148kg
Cw= specific heat capa of water 4200j/kgk
Cal=specific heat capacity of aluminium 903j/kgk
Having gotten all the parameters needed
Ms*Cs*(Ts-Tm)=Mw*Cw*(Tm-Tw) +Mal*Cal*(Tm-Tal)
0.11*Cs*(100-28.8)=0.148*4200*(28.8-19.6) +0.172*903*(28.8-19.6)
cs==((4467267)/(4895))
Cs=912.61Jkg–1K–1
