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3 years ago

Ok so how can i aswer this one?

Physics

2 answers:

natka813 [3]3 years ago

3 0

Use the pythagorean theorem

Natali5045456 [20]3 years ago

3 0

They're just asking for the length of each heavy line !

For each one, you can easily see how many boxes TALL it is, and how many boxes WIDE it is. Those two measurements, plus the heavy line, make a right triangle. The two measurements are the legs of the triangle, and the heavy line is the hypotenuse. So the length of the heavy line is

√(one measurement² + the other measurement²).

For example, the first one, A+B+C .

Line A is 2 boxes to the RIGHT and 2 boxes UP.

Line B is 2 boxes the LEFT and 3 boxes DOWN.

Line C is 1 box to the RIGHT and 2 boxes DOWN.

When you addum up, you get 1 to the RIGHT and 3 DOWN.

Length = √(1²+3²)

Length = √(1 + 9)

Length = √10 boxes

But at the beginning, they said that each box has edges of 10 km.

So the length is (10km) x (√10).

That's about 31.6 km.

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3 years ago

A monkey hangs stationary at the end of a vertical vine. What two forces act on the monkey? Which force, if either, is greater?

ira [324]

Answer:

Tension and Gravitational Force

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3 years ago

A violin string has a standard length of 32.8 cm. It sounds the musical note A (440 Hz) when played without fingering. How far f

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The steps and appropriate formula in musical instrument is as shown in the attachment.

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3 years ago

To understand the decibel scale. The decibel scale is a logarithmic scale for measuring the sound intensity level. Because the d

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The question is incomplete. Here is the complete question.

To understand the decibel scale. The decibel scale is a logarithmic scale for measuring the sound intensity level. Because the decibel scale is logarithmic, it changes by an additive constant when the intensity when the intensity as measured in W/m² changes by a multiplicative factor. The number of decibels increase by 10 for a factor of 10 increase in intensity. The general formula for the sound intensity level, in decibels, corresponding to intensity I is

$\beta=10log(\frac{I}{I_{0}} )dB$ ,

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Part B: What is the sound intensity level β, in decibels, of a sound wave whose intensity is 100 times the reference intensity, i.e. $I=100I_{0}$ ? Express the sound intensity numerically to the nearest integer.

Part C: Calculate the change in decibels ( $\Delta \beta_{2},\Delta \beta_{4}$ and $\Delta \beta_{8}$ ) corresponding to f = 2, f = 4 and f = 8. Give your answer, separated by commas, to the nearest integer -- this will give an accuracy of 20%, which is good enough for sound.