Answer:
B
Explanation:
The iris controls the amount of light that enters the eye by opening and closing the pupil. The iris uses muscles to change the size of the pupil. These muscles can control the amount of light entering the eye by making the pupil larger (dilated) or smaller (constricted).
Answer:
k = 52.2 N / m
Explanation:
For this exercise we are going to use the conservation of mechanical energy.
Starting point. When it is 30 m high
Em₀ = K + U = ½ m v² + m g h
Final point. Right when you hit the water
= K_{e} = ½ k x²
in this case the distance the bungee is stretched is 30 m
x = h
as they indicate that there are no losses, energy is conserved
Em₀ = Em_{f}
½ m v² + m g h = ½ k h²
k = 
let's calculate
k =
k = 52.2 N / m
Answer:
110 meters is the distance where they will intersect
Explanation:
given,
liquid density = 1900 kg/m³
distance of upper hole = 19 m
distance of lower hole = 117 m
acceleration due to gravity = 9.8 m/s²
the speed at each point
for upper hole
v = 19.29 m/s
lower hole
v = 47.88 m/s
The path for each is parabolic
x = v t
we get
upper hole
lower hole
y for upper hole = 80 + y for lower hole


x = 109.32 meters
110 meters is the distance where they will intersect