Answer:
a) # buses = 7
Explanation:
For this exercise we use the kinematic equations, let's find the time it takes to reach the same height
y =
t - ½ g t²
Let's decompose the speed, with trigonometry
v₀ₓ = v₀ cos θ
= v₀ sin θ
v₀ₓ = 40 cos 32
v₀ₓ = 33.9 m / s
= 40 sin32
= 21.2 m / s
When it arrives it is at the same initial height y = 0
0 = ( - ½ gt) t
That has two solutions
t = 0 when it comes out
t = 2 / g when it arrives
t = 2 21.2 /9.8
t = 4,326 s
We use the horizontal displacement equation
x = vox t
x = 33.9 4.326
x = 146.7 m
To find the number of buses we can use a direct proportions rule
# buses = 146.7 / 20
# buses = 7.3
# buses = 7
The distance of the seven buses is
L = 20 * 7 = 140 m
b) let's look for the scope for this jump
R = vo2 sin2T / g
R = 40 2 without 2 32 /9.8
R = 146.7 m
As we can see the range and distance needed to pass the seven (7) buses is different there is a margin of error of 6.7 m in favor of the jumper (security)
The component of waves must have same frequency and phase.
when the component of waves vibrate at the same rate and attain maximum point at the same time, reinforcement of the waves amplitude occur to cause a constructive interference.However, when the two waves are out of phase where one is at minimum when the other is at maximum a destructive interference happens.
why did my answer get deleted??
oh yeah i put a link on there- oopsies.
I wont this time!
I got 30!
He turned his observations into laws, to establish constants and explanations of future scientists.
Answer:
The increase in amount of ozone layer in stratosphere, will be beneficial in preventing the intense and harmful radiations, such as Ultra Violet Rays, to reach the surface of earth.
Explanation:
Ozone layer is formed when a single atom of oxygen (O) reacts with a molecule of oxygen (O₂) to form O₃ (Ozone). The ozone layer in the stratosphere is formed by the reaction of oxygen molecule (O₂) with a single atom of oxygen (O), which is formed by splitting up of an oxygen molecule, by the sunlight.
This ozone layer in stratosphere absorbs harmful radiations, such as Ultra Violet Rays and prevents them to reach the earth. If these rays reach the surface of earth, they can cause life damage to human bodies.
<u>Thus, the increase in amount of ozone layer in stratosphere, will be beneficial in preventing the intense and harmful radiations to reach the surface of earth.</u>
