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seropon [69]
3 years ago
10

As an airplane is flying 20.0 degrees north of east at a speed of 750 km/h. How fast is it moving to the north

Physics
2 answers:
dedylja [7]3 years ago
7 0
<span>in this case velocity of airoplane will be 750*sin20'


</span>
Gwar [14]3 years ago
3 0

Answer:

v_y=71.25\ m/s

Explanation:

Given that,

Speed of an airplane, v = 750 km/hr = 208.33 m/s

An airplane is flying 20.0 degrees north of east, \theta=20^{\circ}

To find,

Velocity in north direction.

Solution,

Let v_y is the speed of the airplane to the north. The y component of any motion is given by :

v_y=v\ sin\theta

v_y=208.33\ m/s\ sin(20)

v_y=71.25\ m/s

So, the airplane is moving with a speed of 71.25 m/s to the north direction.

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A sailor strikes the side of his ship just below the surface of the sea. he hears the echo of the wave reflected from the ocean
Luden [163]

Answer: 3750 m


Explanation:


1) You can find in the literature or internet that the speed of sound in the ocean is about 1500 m/s.


2) Then, you can find the distance travel by the sound wave in 5.0s with the equation distance = speed × time


⇒ distance = 1500m/s × 5.0 s = 7500 m


3) That sound went down until the ocean floor below and cameback all the way until the sailor heard it.


Then, the deep of the ocean fllor is half that distance:


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studyhero A violin string has a length, from the bridge to the end of the fingerboard, of 50 cm. That section of the string has
inessss [21]

Answer:

= 0.517 m

Explanation:

This is a resonance exercise where the ends of the string are fixed, therefore it has a node of them, the fundamental (longest) wavelength created has the form

                λ = 2L

wave speed is related to wavelength and frequency

               v = λ f

               v = 2L f

let's calculate

                v = 2 0.50 440

                v = 440 m / s

since they indicate that the tension of the string does not change and the linear density of the string is constant, the speed of the wave also remains constant

               f =\frac{v}{2L}

let's find the length for the new resonance frequency

               L = \ \frac{v}{2f}

let's calculate

               L = \frac{440}{2 \  528}

               L = 0.5166 m

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How do gases respond to changes in pressure and temperature?
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They compress or expand depending on amount of pressure or depending on the temperature
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The first trophic level of the food chain has the most energy.

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Liono4ka [1.6K]

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