All categories

3 years ago

As the ambulance got closer, Marge noticed that the pitch of the siren got higher. This happened because

Physics

2 answers:

disa [49]3 years ago

7 0

Answer:

The correct choice is

A) the sound waves were pushed closer together.

Explanation:

As the ambulance gets closer, the distance between the ambulance and marge decreases and so does the wavelength of the siren observed by marge. As the wavelength decrease and speed remains the same for the siren, the frequency of the siren increases because wavelength, frequency and speed are related as

Frequency = Speed/wavelength

Clearly, the frequency is inversely related to wavelength.

AfilCa [17]3 years ago

6 0

A) the sound waves were pushed closer together

You might be interested in

We can classify both the shovel and the garden trowel as compound machines. This is because each garden tool contains two simple

Roman55 [17]

Hello,

I believe they are a lever and a wedge.

I hope this helps!

6 0

3 years ago

Read 2 more answers

Dylan has two cubes of iron. The larger cube has twice the mass of the smaller cube. He measures the smaller cube. Its mass is 2

liubo4ka [24]

Answer:

The volume of the larger cube is 5.08 g/cm³.

Explanation:

Given that,

Mass of smaller cube = 20 g

Density of smaller cube $\rho= 7.87 g/cm^2$

Dylan has two cubes of iron.

The larger cube has twice the mass of the smaller cube.

$M_{l}=2m_{s}$

Density is same for both cubes because both cubes are same material.

The density is equal to the mass divided by the volume.

$\rho=\dfrac{m}{V}$

$V=\dfrac{m}{\rho}$

Where, V = volume

m = mass

$\rho=density$

We need to calculate the volume of smaller mass

The volume of smaller mass

$V_{s}=\dfrac{m_{s}}{\rho_{s}}$

$V_{s}=\dfrac{20}{7.87}$

$V_{s}=2.54\ cm^3$

Now, We need to calculate the volume of large cube

$V_{l}=\dfrac{m_{l}}{\rho_{l}}$

$V_{l}=\dfrac{2\times20}{7.87}$

$V_{l}=5.08\ g/cm^3$

Hence, The volume of the larger cube is 5.08 g/cm³.

8 0

3 years ago

Could somebody help me with this please ❤️

Nat2105 [25]

sure its kinda sad a random person breaks your heart

4 0

3 years ago

you need to measure the length of your driveway. which measuring tool would you produce accurate results that you would expectto

lesantik [10]

I’d assume a tape measure?

3 0

3 years ago

Read 2 more answers

The center of a moon of mass m is a distance D from the center of a planet of mass M. At some distance x from the center of the

Eddi Din [679]

Answer:

x = D (M/M-m) 2.41

Explanation:

a) Let's apply Newton's second law to find the summation of force, where each force is given by the law of universal gravitation

F = g m₁m₂ / r²

Σ F = 0

F1- F2 = 0

F1 = F2

We set the reference system in the body of greatest mass (M) the planet

F1 = g m₁ M / x²

F2 = G m1 m / (D-x)²

G m₁ M / x² = G m₁ m / (D-x)²

M (D-x)² = m x²

MD² -2MD x + M x² = m x²

x² (M-m) -2MD x + MD² = 0

We solve the second degree equation

x = [2MD ±√ (4M²D² - 4 (M-m) MD²)] / 2 (M-m)

x = {2MD ± 2D √ (M² + (M-m) M)} / 2 (M-m)

x = D {M ± Ra (2M²-mM)} / (M-m)

x = D (M ± M √ (2-m/M)) / (M-m)

x = D (M / (M-m)) (1 ±√ (2-m/M)

Let's analyze this result, the value of M-m >> 1, so if we take the negative root, the value of x would be negative, it is out of the point between the two bodies, so the correct result must be taken with the positive root

x = D (M / (M-m)) (1 + √2)

x = D (M/M-m) 2.41

b) X = 2/3 D

x = D (M/M-m) 2.41

2/3 D = D (M/(M-m)) 2.41

2/3 (M-m) = M 2.41

2/3 M - 2/3 m = 2.41 M

1.743 M = 0.667 m

M/m = 0.667/1.743

M/m = 0.38

3 0

3 years ago