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Ivan
3 years ago
6

You are heading toward an island in your speed boat when you see a friend standing on the shore of the island. You sound the boa

t's horn. Is the wavelength of the sound your friend perceives greater than, less than, or equal to the wavelength that would be heard without any motion of the boat, and why?
Physics
1 answer:
monitta3 years ago
8 0

Answer:

Greater than

Explanation:

The Wavelength will be higher than what will be heard without any motion on the boat due to the Doppler Effect, which is the change in the frequency of a sound wave whenever there's a relative motion between the source of the wave and observer. The amount of shift in frequency depends on the speed of the source towards the observer; the higher the velocity of the source, the higher the shift.

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Which will have a larger momentum when moving at the same speed: a 2,000-kg truck or a 1,000-kg sedan
Alina [70]

Answer:

2000 kg

Explanation:

Given that Which will have a larger momentum when moving at the same speed: a 2,000-kg truck or a 1,000-kg sedan

According to the definition of momentum, momentum is the product of mass and velocity.

That is,

Momentum = mass × velocity

Since velocity or speed is the same, then, the one of higher mass will have a greater momentum.

Therefore, the 2000 kg truck will have the greater momentum.

5 0
3 years ago
Why do you need a driver’s license to buy alcohol when you can’t drink and drive?
exis [7]

Answer:

Because when people under the age of 21 try to buy alcohol, they need to be verified by their state that they are that age. So if they are under legal age, 21,  the store isn't allowed to give them the Alcoholic beverage.

Explanation:

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3 years ago
How can meteorologists use the jet stream to predict the weather ?
barxatty [35]
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Hope this helps</span>
5 0
3 years ago
The efficiency of a screw is low because of _____.
AfilCa [17]
The correct answer that would best complete the given statement above would be the second option. A screw is an inclined plane wrapped around a cylinder. <span>The efficiency of a screw is low because there is more input than output. In other words, it is because of friction. Hope this answer helps.</span>
6 0
3 years ago
Read 2 more answers
A car is moving in uniform circular motion. If the cars speed were to double to keep the car moving with the same radius the acc
Stells [14]

Answer:

<em>The centripetal acceleration would increase by a factor of 4</em>

<em>Correct choice: B.</em>

Explanation:

<u>Circular Motion</u>

The circular motion is described when an object rotates about a fixed point called center. The distance from the object to the center is the radius. There are other magnitudes in the circular motion like the angular speed, tangent speed, and centripetal acceleration. The formulas are:

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The centripetal acceleration would increase by a factor of 4

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5 0
3 years ago
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