1) First of all, let's find the resistance of the wire by using Ohm's law:
where V is the potential difference applied on the wire, I the current and R the resistance. For the resistor in the problem we have:
2) Now that we have the value of the resistance, we can find the resistivity of the wire
by using the following relationship:
Where A is the cross-sectional area of the wire and L its length.
We already have its length
, while we need to calculate the area A starting from the radius:
And now we can find the resistivity:
Answer:
C. Electric energy
Explanation:
A generator is designed to convert chemical energy to mechanical energy and them electrical energy.
- It is an alternate source of electricity for most homes and industrial establishments.
- The source of energy for the generator is a fuel usually fossil fuels.
- This energy source is ignited and it produces heat energy which drives the motion of the pistons in the set.
- As the piston moves, an magnetic field is cut through by a conducting wire.
- This inducts the production of currents.
Answer:
ωf =1.78 rev/s
Explanation:
it is a non elastic collision, so conservation of angular momentum is used. and there id no friction
I₁ωi₁ + I₂ωi₂ = (I₁ + I₂)ωf
ωi₁ = 2.0 rev/s*(2π) rad/rev = 4.0π rad/s
assume ωi₂ = 0
Sol the equation to wf
ωf = (½m₁r₁²)ωi₁ / (½m₁r₁² + ½m₂r₂²)
ωf = (m₁r₁²)*ωi₁ / (m₁r₁² + m₂r₂²)
ωf = (5.0kg*(0.18m)²)4.0 π rad/s / ((5.0kg*(0.18m)²) + (3.1*(0.08m)²))
ωf =11.19 rad/s/ 2π
ωf =1.78 rev/s
Answer:
Annihilation
Explanation:
Annihilation is the phenomenon that occurs when a particle of matter and its corresponding anti-particle of antimatter collide with each other. When this collision occurs, the particle and antiparticle "disappear", and all their mass is converted into pure energy, according to Einstein's famous equation:
where
E is the energy released
m is the mass of the two particles together
c is the speed of light
Annihilation is the process that releases the largest amount of energy at all, since the whole mass of the particles involved is 100% converted into energy. An example of annihilation is the electron-positron annihilation.
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