Coherent light of frequency f travels in air and is incident on two narrow slits. The interference pattern is observed on a dist
1 answer:
Answer:
A) d = 6.1857 10⁻⁵ m
Explanation:
In the double-slit experiment the constructive interference is given by the expression
d sin θ = m λ
d =
let's use the relationship between speed, wavelength and frequency
c = λ f
λ = c / f
λ = 3 10⁸ / 5.60 10¹²
λ = 5.357 10⁻⁵ m
I do not know India in order of interference, we will assume that m= 1
d = 1 5,357 10⁻⁵ / sin 60
d = 6.1857 10⁻⁵ m
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Answer:
W = 1884J
Explanation:
This question is incomplete. The original question was:
<em>Consider a motor that exerts a constant torque of 25.0 N.m to a horizontal platform whose moment of inertia is 50.0kg.m^2 . Assume that the platform is initially at rest and the torque is applied for 12.0rotations . Neglect friction. </em>
<em> How much work W does the motor do on the platform during this process? Enter your answer in joules to four significant figures.</em>
The amount of work done by the motor is given by:
Where I = 50kg.m^2 and ωo = rad/s. We need to calculate ωf.
By using kinematics:
But we don't have the acceleration yet. So, we have to calculate it by making a sum of torque:
=>
Now we can calculate the final velocity:
Finally, we calculate the total work:
Since the question asked to "<em>Enter your answer in joules to four significant figures.</em>":
W = 1884J
Answer:
Explanation:
Given that
The speed of the airplane ,v= 142 m/s
The speed of the air ,u = 30 m/s
Lets take angle make by airplane from east direction towards north direction is θ .
Now by using diagram ,we can say that
Now by putting the values in the above equation we get
Therefore the angle will be 12.19° .
