Answer:N=13.53 rpm
Explanation:
Given
radius 
Centripetal acceleration 
and centripetal acceleration 
where 



and 


Answer:
f = c / λ
Explanation:
Electromagnetic waves are types of periodic waves. They propagate with the same speed as light (3 * 10⁸ m/sec).
Therefore:
velocity of wave = c
Now, the equation that relates speed of wave and its frequency is as follows:
c = λf
where:
c is the speed of wave
f is the frequency of the wave
λ is the wavelength of the wave
Solve the above equation for frequency, we will end up with:
f = c / λ
Answer:
Wavelength of light will be 632.73 nm
Explanation:
We have given width of the single slit 
Angle is given as 
We have to find the wavelength of light for first dark fringe
We know that for dark fringe it is given that

For first fringe n = 1
So 

Answer:
The initial speed of the pelican is 8.81 m/s.
Explanation:
Given;
height of the pelican, h = 5.0 m
horizontal distance, X = 8.9 m
The time of flight is given by;

The initial horizontal speed of the pelican is given by;
X = vₓt
vₓ = X / t
vₓ = 8.9 / 1.01
vₓ = 8.81 m/s
Therefore, the initial speed of the pelican is 8.81 m/s.
Best Answer: <span>Power = Current * Voltage
Therefore (B) is correct.
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