Answer: The sound pitch (frequency) and the sound intensity (strength) of the car will decrease.
Explanation:
- As the distance between the source and the person increases, there must be more air molecules involved in transferring the sound leading to a decrease in the sound pitch (frequency “ number of sound waves received per second”).
- According to the inverse square law of sound “sound intensity is inversely proportional to the square of the distance between the source and the person”, as the distance between the source and person doubles, sound intensity (strength) will decrease to its quarter..
<h3><u>Answer;</u></h3>
New tire pressure = 214.286 kPa
<h3><u>Explanation;</u></h3>
According to Boyle's Law the volume of a fixed mass of a gas is inversely proportional to pressure at constant temperature.
P α V, and PV = Constant
Therefore;
P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume , P2 is the new pressure and V2 is the new volume.
P2 = P1V1/V2
= (300 kPa × 30 L)/ 42 L
<u>= 214.286 kPa</u>
* Lab question: How can you distinguish a physical change from a chemical change?
> Format: How can you distinguish A from B?
Answer! Comparison: physical changes vs. chemical changes
Answer:
A white precipitate is formed
Explanation:
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Answer:
Na2SO4 + Bi(NO3)3 = Bi2(SO4)3 + NaNO3