Answer:
P = 90 W
Explanation:
Mass of an object, m = 30 kg
Speed of the object, v = 15 m/s
Distance, d = 10 m
Work done, W = 900 J
Time, t = 10 s
We need to find the power generated by this project. We know that power is equal to work done divided by time taken.
So,
So, the required power generated is 90 W.
Answer:
For the calculation of I = Erms2 / (cμ0), I get
I = (91.5 / √2)2 / [(2.99 x 108) (1.26 x 10-6)] = 11.07 W/m2
<u>
Intensity = 11.07 w/m^2</u>
t = 17.1 s
A = 0.0229 m2
U = energy = IAt = (11.07) (0.0229) (17.1) J = 4.34 J
<u>Energy = 4.34 Joules</u>
Answer:
13.8 billion years
Explanation:
In physical cosmology, the age of the universe is the time elapsed since the Big Bang. The current measurement of the age of the universe is around 13.8 billion.
Answer:
The potential energy is
Explanation:
From the question we are told that
The inner radius is
The outer radius is
The common length is
The potential difference is
Generally the capacitance of the cylindrical capacitor is mathematically represented as
Where is the permitivity of free space with the values
and k is the dielectric constant of the dielectric material here the dielectric material is free space so k = 1
Substituting values
The potential energy stored is mathematically represented as
substituting values
We want to find how many photons per second a laser emits given that we know the energy of a single photon and the power of the laser, we will get:
1.90712*10^18 photons per second.
So we know that the photon energy is 1.8 eV, and the laser power is:
P = 0.55 watts
Remember that:
1 watt = 1 J/s
And:
1 eV = 1.60218*10^(-19) J
Then we can convert the two values that we have so we have both in joules:
Power = P = 0.55 J/s
Energy = 1.8 eV = 1.8*(1.60218*10^(-19) J) = 2.883924*10^(-19) J
The number of photons emitted per second is just the quotient between the power and the energy of a single photon, we have:
Number = (0.55 J/s)/(2.883924*10^(-19) J) = 1.90712*10^18 photons per second.
If you want to learn more, you can read:
brainly.com/question/20343793