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3 years ago

Explain why airplane pilots should know wind velocity and not just wind speed during a flight

2 answers:

8 0

It makes a big difference if the wind is blowing 30 miles per hour
from the North, from the South, from the East, from the West, or
from the Southeast, etc.

In order to fly the plane in the direction that he actually wants to go, the
pilot needs to handle every possible wind direction in a different way.

If he only knows that the air he's in is moving over the ground at 30 miles
per hour, he would have no way to make the required correction, and the
airplane would get blown way off-course.

Lapatulllka [165]3 years ago

6 0

Air speed is how fast you are peddling over the ground, wind speed is how fast the wind is blowing above the ground.Depending on the correlation between the two with direction thrown the pilot knows what sort of resistance he is flying against.

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Deriving projectile motion formulas

kipiarov [429]

Answer:

Projectile motion formula or equations derived (In Tabular format)Motion Path equation:

y = (tanθ) x – (1/2) g . x2/(V0 cosθ)2

Explanation:

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2 years ago

HELP ME PLEASEEEEEEEEEEEEEE

rjkz [21]

Answer:

The one you have selected is correct. :)

Explanation:

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3 years ago

A circuit contains a single 220 pF capacitor hooked across a battery. It is desired to store three times as much energy in a com

Anettt [7]

Answer

The capacitor should be connected in parallel as parallel connection gives the arithmetic sum of capacitance which will give a corresponding sum of energy while capacitors in series gives the sum of the reciprocal if the individual capacitance

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4 years ago

A student leaving school travels 100 m East before he realizes he left his textbook in his locker. He heads back towards school,

andrew11 [14]

-- The overall distance he travels is (100m + 30m + 70m) = 200 meters.

-- His displacement when he arrives at his front door is

D = (100m East) + (30m West) + (70m East)

D = (100m + 70m)East + (30m)West

D = (170m East) + (30m West)

D = 140 meters East

It's interesting to notice that his displacement is 60 meters shorter than the distance he walked.

That's because there's a stretch of 30 meters somewhere in the middle that he actually covered three times.

Two of those times added to the distance his shoes covered (2x30m=60m), but they cancelled out of the displacement.

His front door is 140 meters East of school. He walked 60m farther than that, going back and forth over the 30m piece.

6 0

4 years ago

If the wave represents a sound wave, explain how increasing amplitude will affect the loudness of the sound? If we decrease the

Viktor [21]

Answer:

Explanation:

Think of a sound wave like a wave on the ocean, or lake... It's not really water moving, as much as it's energy moving through the water. Ever see something floating on the water, and notice that it doesn't come in with the wave, but rides over the top and back down into the trough between them? Sound waves are very similar to that. If you looked at a subwoofer speaker being driven at say... 50 cycles a second, you'd actually be able to see the speaker cone moving back and forth. The more power you feed into the speaker, the more it moves back and forth, not more quickly, as that would be a higher frequency, but further in and further out, still at 50 cycles per second. Every time it pushed out, it's compressing the air in front of it... the compressed air moves away from the speaker's cone, but not as a breeze or wind, but as a wave through the air, similar to a wave on the ocean

More power, more amplitude, bigger "wave", louder ( to the human ear) sound.

If you had a big speaker ( subwoofer ) and ran a low frequency signal with enough power in it, you could hold a piece of paper in front of it, and see the piece of paper move in and out at exactly the same frequency as the speaker cone. The farther away from the speaker you got, the less it'd move as the energy of the sound wave dispersed through the room.

Sound is a wave

We hear because our eardrums resonates with this wave I.e. our ear drums will vibrate with the same frequency and amplitude. which is converted to an electrical signal and processed by our brain.

By increasing the amplitude our eardrums also vibrate with a higher amplitude which we experience as a louder sound.

Of course when this amplitude is too high the resulting resonance tears our eardrums so that they can't resonate with the sound wave I.e. we become deaf

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3 years ago