What happens when a blaring siren moves away from you

Answers

Answer 1

Answer: It gets quieter as the sound waves have to travel further and so the volume decreases

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_________ constancy refers to the ability to understand that an object retains the same lightness even when illuminated differently.a. Color
b. Shape
c. Brightness
d. Weight

Answers

Correct answer choice is :

C) Brightness

Explanation:

A sheet of white paper seen in the bright sunlight reveals a very different quantity of light than the same sheet of paper seen later that night in a softly illuminated room. Yet we regard the paper as having the same paleness in each case. This is an instance of brightness constancy, our capability to see objects as proceeding to have the same brightness even though light may change their direct visual features.

I think C. Brightness

A quantity of gas has a volume of 0.20 cubic meter and an absolute temperature of 333 degrees kelvin. When the temperature of the gas is raised to 533 degrees kelvin, what is the new volume of the gas? (Assume that there's no change in pressure.) A. 0.0006 m3
B. 0.2333 m3
C. 0.2146 m3
D. 0.3198 m3

Answers

pV = n R T => if pressure is constant => p = n R T / V = const. => p / n R = T/ V = const. => T / V = const. T1 = 333 K T2 = 533 K V1 = 0.2 m3
T1 / V1 = T2 / V2 => V2 = V1 x T2 / V2 = 0.2 x 533 / 333 = 0.32 m^3 answer D is correct

PLEASE HELP ME!If the mass of one object is tripled, and the distance between them is doubled, how does the force of gravity change?
a. Force is multiplied by 4
b. Force is divided 3
c. Force is multiplied 3/4
d. Force is divided 3/4

Answers

Force between two object is given by F = Gm1m2/r^2
If the mass of one object is tripled, and the distance between them is doubled,
then F(new) = Gm13m2/(2r)^2 = 3Gm1m2/4r^2 = 3/4 x Gm1m2/r^2 = 3/4 x F
i.e. F(new) = 3/4 multiplied by F.
Therefore, Force is multiplied by 3/4.

Which refers to the rate of change in velocity?speed
O acceleration
O direction
O magnitude

Answers

The answer is obvious acceleration lol sorry if it sounds mean

As the mechanical advantage increases what happens to the length of the string you have to pull to raise the block?

Answers

the string will tighten up to move the block

What is the average speed in miles per hour of the car that traveled a total of 200 miles in 5.5 hours

Answers

Answer:

Average speed of the car is 36.36 miles per hour

Explanation:

It is given that,

Total distance traveled by the car, d = 200 miles

Total time taken, t = 5.5 hours

In this case, we have to find the average speed of the car. Average speed of the car is defined as the total distance divided by total time taken. Mathematically, it can be written as :

$s=(d)/(t)$

$s=(200\ miles)/(5.5\ hours)$

s = 36.36 miles per hour

Hence, the average speed of the car is 36.36 miles per hour.

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