Yes dams are made wider at the bottom because the pressure of the water pressure is greater there
From the theory we know that:
c = λ / T
f = 1 / T
Where:
c = 3.
/ m (the speed of light)
λ is the wavelengh (in meters)
T is the period (in seconds)
f is the frequency (in Hz)
We were told that:
f = 7.30 . 
And we want to find out the value of λ.
c = λ / T
c = λ . 1/T
Swaping 1/T = f
c = λ . f
λ = c / f
λ = 3 . / 7.30 .
λ = 4.12 
m
Response: 4.12 m = 412 nm
:-)
For figure one the “+” are protons and the “-“ are electrons for the second one the middle is the nucleus and the other is the orbit
Answer:
Reflection of light means the bouncing back of light in another direction after hitting a smooth polished surface
<h3>
<u>laws </u><u>of </u><u>reflection</u></h3>
1) Angie of incidence is equal to the angle of reflection
2) The nornal ray, reflected ray and the incident ray all lie in the same plane
