<u>Answer:</u> The average kinetic energy of helium atoms is
<u>Explanation:</u>
To calculate the average kinetic energy of the atom, we use the equation:
where,
K = average kinetic energy = ?
k = Boltzmann constant =
T = temperature =
Putting values in above equation, we get:
Hence, the average kinetic energy of helium atoms is
A car traveling along the highway needs a certain amount of force exerted on it to stop it in a certain distance.
More stopping force is required when the car has more mass, or more momentum, or less stopping distance. <em>(D)</em>
Law of conservation of momentum
67*x=4.2*5.6
Answer: wind pushes directly against the blades of the turbine, which converts the linear motion of the wind into the rotary motion, then it spins the generator's rotor and the harder the wind pushes, the more electrical energy can be generated.
Explanation:
Answer:
Explanation:
number of turns, N = 149
radius, r = 2.15 cm
Area, A = πr² = 3.14 x 2.15 x 2.15 x 10^-4 = 1.45 x 10^-3 m^2
Change in magnetic field, ΔB = 95.5 - 50.5 = 45 mT = 45 x 10^-3 T
time, Δt = 0.165 second
induced emf
e = N x dФ/dt
where, dФ be the change in flux.
e = N x A x ΔB/Δt
e = 149 x 1.45 x 10^-3 x 45 x 10^-3 / 0.165
e = 0.058 V