Let's use Newton's 2nd law of motion:
Force = (mass) x (acceleration)
Force = (68 kg) x (1.2 m/s²) = 81.6 newtons .
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Answer: Doppler effect
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Explanation:
A radar gun (also known as a Doppler radar) uses the Doppler effect when measuring "return echoes" after having sent a microwave signal (a type of electromagnetic radiation).
In this context the Doppler effect consists of the change in a wave perceived frequency when the emitter of the waves, and the observer move relative to each other.
In the case of radars, a microwave signal is sent to a target (the tennis or baseball in this case) and then is reflected after "hitting" the target, so that the radar system measures this difference between the sent signal and the reflected signal.
It help protect you from coming out the car when you are in a accident
Answer:
The transmitted intensity through all polarizers = 34.73
Explanation:
Given :
Incident intensity = 
Angle between the transmission axis and polarizer optic axis = 18°
According to the malus law, when unpolarized or polarized light passes through polarizing disk, the intensity of the transmitted light is directly proportional to the square of the cosine of angle between the transmission axis and polarizer optic axis.
∴ 
Where 
transmitted intensity, 
incident intensity, 
angle between the transmission axis and polarizer optic axis.
Here, there are four polarizing disks so that.
from first disk,
∴ 
₁ 
18°
= 
×
= 
Now ₁ behave as an incident light for second polarizer so we only multiply
term
so we write,
∴ ₂ = ×
From third polarizer,
∴ ₃ = 
×
From forth polarizer,
∴ ₄ = 
×
Therefor, the the transmitted intensity through forth polarizer = 34.73 
.
The neutrophil are a tipe of white blood cells. Those are the first to migrate to the site of the infection to kill the invaders.
