Answer:
P = 43.2 10⁻¹⁰ W
Explanation:
To find the power, let's start by calculating the energy of each photon using the Planck equation
E = h f
Where h is the Planck constant that is worth 6.63 10⁻³⁴ J s and f is the emitted frequency
The speed of light is related to wavelength and frequency
c = lam f
Let's replace
E = h c / lam
E = 6.63 10⁻³⁴ 3. 10⁸/460 10⁻⁹
E = 4.32 10⁻¹⁹ J
This is the energy of each photon emitted, the total energy is the product of this value by the number cded photons
Let's calculate the power
P = W / t = Total E / t
P= N E /t
P = 1 10⁹ 4.32 10⁻¹⁹ / 0.10
P = 43.2 10⁻¹⁰ W
Answer:
K = ( (pi)^2 * n^2 * m * r^2 ) / t^2
Explanation:
=(1/2)Iw^2
I = moment of inertia= (1/2)mr^2
w = angular speed = 2(pi)n/t
By substitution, we have
K = ( (pi)^2 * n^2 * m * r^2 ) / t^2
We know, Ep = Es * Np / Ns
Here, Es = 75 V
Np = 600
Ns = 300
Substitute their values,
Ep = 75 * 600/300
Ep = 75 * 2
Ep = 150 Volts
In short, Your Answer would be Option B
Hope this helps!
Given:
Initial velocity (u) = 10 m/s
Acceleration (a) = 50 m/s²
Time taken (t) = 3 s
To Find:
Final velocity (v)
Answer:
By using equation of motion, we get:
Final velocity (v) = 160 m/s