Answer:
θ = 14.45º = 0.252 rad
Explanation:
The expression that describes the phenomenon of diffraction is
a sin θ = m λ
Where a is the width of the exit opening in this case the width of the door, Lam is the wavelength, m the diffraction order for destructive interference,
Let's use the relationship between the speed of the wave is the producer of its frequency by the wavelength
v = λ f
λ = v / f
λ = 344/1220
λ = 0.282 m
sin θ = m λ / a
For the first destructive interference m = 1
sin θ = 1 0.282 /1.13
sin θ = 0.24956
θ = sin-1 (0.24956)
θ = 14.45º
We pass radians
θ = 14.45 (pi rad / 180º) = 0.252 rad
Power is the RATE of use, flow, or transfer of energy.
1 watt = 1 joule PER SECOND.
The correct choice is ' <em>a</em> '.
Answer:
Explanation:
Length if the bar is 1m=100cm
The tip of the bar serves as fulcrum
A force of 20N (upward) is applied at the tip of the other end. Then, the force is 100cm from the fulcrum
The crate lid is 2cm from the fulcrum, let the force (downward) acting on the crate be F.
Using moment
Sum of the moments of all forces about any point in the plane must be zero.
Let take moment about the fulcrum
100×20-F×2=0
2000-2F=0
2F=2000
Then, F=1000N
The force acting in the crate lid is 1000N
Option D is correct
The type of heat that the Sun emits is called UV (Ultra Violet) rays. This is a natural type of heat, but it can also be dangerous if you expose yourself to too much UV heat, causing "sunburns", or even skin cancer.
