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bogdanovich [222]
3 years ago
7

While strolling downtown on a saturday afternoon, you stumble across an old car show. as you are walking along an alley toward a

main street, you glimpse a particularly stylish alpha romeo pass by. tall buildings on either side of the alley obscure your view, so you see the car only as it passes between the buildings. thinking back to your physics class, you realize that you can calculate the car's acceleration. you estimate the width of the alleyway between the two buildings to be 3 m. the car was in view for 0.2 s. you also heard the engine rev when the car started from a red light, so you know the alpha romeo started from rest 3 s before you first saw it. find the magnitude of its acceleration?
Physics
1 answer:
Inessa [10]3 years ago
3 0
The speed of the car during the 0.2 second interval is 

Vf = d/t = 3m/0.2s = 15 m/s

It took the car (3 + 0.2) seconds to reach that speed. (Initially at rest)

Vf = Vo +a*t

Vo is the initial speed (Vo = 0)

Vf is the speed of the car at any given time

a is the acceleration

So,

a = Vf/t = 15m/s /(3.2 s) = 4.687 m/s<span>^</span>2

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Two speakers in a stereo emit identical pure tones. As you move around in front of the speakers, you hear the sound alternating
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Answer:

Interference

Explanation:

When two traveling waves traveling waves along the same path are superimposed(combine). The superimposition of these two waves results in the production of a resultant wave which is defined by the net effect of the two waves. Wave interference occurs most types of waves including radio wave, light, acoustic waves and other wave types. Alternating sound between loud and Zero is heard as the two speakers emit identical pure tones because the resultant amplitude after the interference of the two sound waves is the vector sum of each of their amplitudes. A loud sound is heard, when the crest of both waves meets each other and a zero is heard if the crest of one meets the trough of the other as they cancel out.

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A politician running for office tells a crowd at a rally that the only way to keep the food chain safe is to stop allowing the g
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B. No. He presented no scientific data to support his claim.

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The pickup truck has a changing velocity because the pickup truck
yaroslaw [1]

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travilng on a curve in the road

Explanation:

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A golf ball reaches a height of 150 m before it stops rising and starts to fall to the ground. What is the golf balls speed (rou
artcher [175]

Answer:

v = 54 m/s

Explanation:

Given,

The maximum height of the flight of golf ball, h = 150 m

The velocity at height h, u = 0

The velocity of the golf ball right before it hits the ground, v = ?

Using the III equations of motion

                               <em>  v² = u² + 2gh</em>

Substituting the given values in the above equation,

                                 v² = 0 + 2 x 9.8 x 150 m

                                     = 2940

                                  v = 54 m/s

Hence, the speed of the golf ball right before it hits the ground, v = 54 m/s

4 0
3 years ago
Suppose the wavelength of the light is 550 nm . How much farther is it from the dot on the screen in the center of fringe E to t
Bogdan [553]

Complete question:

Suppose the wavelength of the light is 550 nm . How much farther is it from the dot on the screen in the center of fringe E to the left slit than it is from the dot to the right slit? Fringe C is the central maximum.

Check the image uploaded.

Answer:

The difference is 1100 nm

Explanation:

A bright fringe creates constructive interference, the wavelength is always in a multiple form.

At center fringe, the difference is (550 nm)(0) = 0

For the first maximum, the difference is (550 nm)(1) = 550 nm

For the second maximum, the difference = (550 nm)(2) = 1100 nm

Thus, for nth maxima, the difference is (550 nm)(n)

From the image uploaded, C is located on the second maximum, therefore the difference is given as  (550 nm)(2) = 1100 nm

Therefore, the dot on the screen in the center of fringe E to the left slit is 1100 nm

3 0
4 years ago
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