The frequency heard by an observer in the moving car as he approaches the police car is 558.6 Hz.
<h3>Frequency hear by the observer</h3>
The frequency heard by the observer is calculated by applying the principle of Doppler effect.
f₀ = f'[(v/v - vs)]
where;
- f₀ is the observed frequency
- v is speed of sound = 343 m/s
- vs is the speed of the source
f₀ = 500[(343 / 343 - 36)]
f₀ = 500(343/307)
f₀ = 558.6 Hz
Thus, the frequency heard by an observer in the moving car as he approaches the police car is 558.6 Hz.
Learn more about frequency here: brainly.com/question/10728818
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1) Blood flow: increases during warming improving muscle and joint elasticity. This decreases the possibility of having an injury.
2) Body temperature: This causes the cellular metabolism to increase. It also causes vasodilatation that allows a greater supply of oxygen and nutrients.
Answer: t = 1.6s
Explanation: Use Fab 5 equation to solve for t (d is irrelevant so use equation without d)
vi = 16m/s, a = -10m/s^2, vf = 0m/s, t = ?
(Assume up is positive so acceleration is negative!!!)
a = vf - vi / t
-10 = 0 - 16 / t
-10t = -16
t = 1.6s
Hope this helps! :)
Contact- Frictional force (Needs to be rubbing against the toy for it to happen)
Non Contact- Probably…? Gravitational force (Doesn’t need to be touching for it to happen)
Answer:
4.96cm
Explanation:
distance = 5.20km = 5.2 × 10³ m
Wavelength , λ = 550nm = 5.50 × 10⁻⁷m
distance of moon, L = 384000 km = 3.84 × 10⁸m
formula for resolving power of two objects
d = (1.22 × λ ×L) / D
D = (1.22 × λ ×L) / d
= (1.22 × 5.50 × 10⁻⁷ ×3.84 × 10⁸) / 5.2 × 10³
D = 4.96cm
