Answer:
hmmm
Explanation:
error of parallax or poor measurement
poor structural material
Answer:
Ns = 293 turns
Explanation:
The magnetic field of a solenoid is given as follows:
B = μ₀NI/L
where,
B = Magnetic Field = (40.5 Gauss)(1 T/10000 Gauss) = 4.05 x 10⁻³ T
μ₀ = Permeability of Free Space = 4π x 10⁻⁷ T/Am
N = No. turns in solenoid = ?
I = Current = 0.05 A
L = Length = 10 cm = 0.1 m
Therefore,
4.05 x 10⁻³ = (4π x 10⁻⁷ )(N)(0.05)/0.1
N = (4.05 x 10⁻³)/(6.28 x 10⁻⁷)
N = 6446 turns
Now, we use turns ratio formula for transformer:
Np/Ns = Vp/Vs
where,
Np = No. of turns in primary coil = 6446 turns
Ns = No. of turns in secondary coil = ?
Vp = Primary Voltage = 220 V
Vs = Secondary Voltage = 10 V
Therefore,
6446 turns/Ns = 220 V/10 V
Ns = 64460 turns/220 V
<u>Ns = 293 turns</u>
Answer:
The momentum of bike is more.
Explanation:
Given that,
Mass of the kid, m = 100 kg
Speed of the bike, v = 10 m/s
The momentum of the kid is given by :
p = mv
So,
p = 100 kg × 10 m/s
p = 1000 kg-m/s
Mass of the truck, m = 5000 kg
Speed of the truck, v = 0.1 m/s
The momentum of the truck is given by :
p = 5000 kg × 0.1 m/s
= 500 kg-m/s
So, the momentum of the kid riding a bike is more than that of the truck.
Answer : The change in enthalpy of the reaction is, -310 kJ
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The given main reaction is,
The intermediate balanced chemical reaction will be,
(1)
(2)
(3)
Now we will reverse the reaction 1 and multiply reaction 1 by 2, reaction 2 by 2 and reaction 3 by 3 then adding all the equations, we get :
(1)
(2)
(3)
The expression for enthalpy of formation of will be,
Therefore, the change in enthalpy of the reaction is, -310 kJ