A police car is parked by the side of a highway and its siren emits a sound measuring 750 Hz. As you approach the police car from a distance, you hear a change in the sound. The change is in the sound's
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As you approach the police car with blaring siren, you hear a change in pitch and frequency. The apparent pitch changes as a result of the Doppler effect. Frequency determines pitch; frequency and wavelength are inversely proportional. You wouldn't "hear" either one. The result is pitch.
D) pitch and frequency.
Answer:
The correct answer would be frequency, intensity, and amplitude.
It can be explained with the help of Doppler effects which states that the frequency or wavelength of sound changes (increases or decreases) as source and observer move towards or away from each other.
Due to this effect, the frequency and intensity of siren increase as we move towards the siren.
In addition, amplitude also increases as we move towards the source of the sound and decreases as the observer moves away from the source.
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The mass percent of H in NaHCO₃ is 1.19%
We'll begin by calculating the molar mass of NaHCO₃. This can be obtained as follow:
Molar mass of NaHCO₃ = 23 + 1 + 12 + (16×3)
= 23 + 1 + 12 + 48
= 84 g/mol
From the molar mass of NaHCO₃, we can see that 1 g of H is present in 84 g of the compound (NaHCO₃)
Finally, we shall determine the mass percent of H in NaHCO₃. This can be obtained as follow:
Mass of H = 1 g
Mass of NaHCO₃ = 84 g
Mass percent of H =?
Mass percent =
Mass percent of H = × 100
Mass percent of H = 1.19%
Therefore, the mass percent of H in NaHCO₃ is 1.19%
Learn more: brainly.com/question/18763214
NaHCO3 = 84.0066 g/mol
H = 1.00794 g/mol
(1.00794 g/mol) / (84.0066 g/mol)
= 0.011998
= 1.20% H
B. move from the negatively charged body to the positively charged body.
C. remain in the negatively charged body.
D. move from the positively charged body to the negatively charged body.
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B. move from the negatively charged body to the positively charged body
This is because the negative free electrons will be attracted to the positive body and then the electrons will move to the positive body.
Hope this helps :)
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Answer:
potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
Explanation:
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here is your anwer
O hope it is useful for you
Answer:
2.7N
Explanation:
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