C. isotope
Isotopes have the same atomic number but different mass number because of the difference in the number of neutrons in the nucleus of the atom.
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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Answer:
The correct answer is a blocked blood vessel.
Explanation:
Hope this helped Mark BRAINLIEST!!!
FOR PART 3!!!! THIS IS THE ANSWER
The variables for this experiment include mass, volume and the materials in the various balls, as well as their densities. In Part III, you will be investigating the questionable baseball. Use the drop-down menus to complete the sentences and identify the independent and dependent variables
MATERIAL
DENSITY
