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Blizzard [7]
4 years ago
13

If an air traffic controller is describing the speed of an airplane as well as the direction in which it should begin its decent

, then the air traffic controller is describing the airplane's
a. magnitude.
b. velocity.
c. speed.
d. acceleration.
Physics
2 answers:
Sever21 [200]4 years ago
8 0
I think the correct answer from the choices listed above is option B. The air traffic controller is describing the airplane's velocity. Velocity<span> is a physical vector quantity; both magnitude and direction are needed to define it. Hope this answers the question. Have a nice day.</span>
liberstina [14]4 years ago
5 0

The correct answer for this is B. Velocity. To find velocity you need the speed and direction, what we have. Sorry for the wait, Good luck :)

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Which is a dopant for a p-type semiconductor? arsenic indium phosphorus antimony
erastova [34]

Answer:

As opposed to n-type semiconductors, p-type semiconductors have a larger hole concentration than electron concentration.

Explanation:

In p-type semiconductors, holes are the majority carriers and electrons are the minority carriers. A common p-type dopant for silicon is boron or gallium. hope this you :)

4 0
3 years ago
An airplane has a mass of 1.9E6 kg and the air flow past the
nordsb [41]

Answer:

v_{1}=164.4 m/s  

Explanation:

The Bernoulli equation is:

P+\frac{1}{2}\rho v^{2}+\rho gh=constant (1)

  • P is pressure related to the fluid
  • ρ is the density of the fluid (ρ(air)=1.23 kg/m³)
  • v is the speed of the fluid
  • h is the displacement from one position to the other

Now let's apply the equation (1), for our case:

P_{1}+\frac{1}{2}\rho v_{1}^{2}=P_{2}+\frac{1}{2}\rho v_{2}^{2} (2)

here we assume that h is the same in both cases so it canceled out.

  • <u>subscript 1</u> is related to the upper surface of the wings
  • <u>subscript 2</u> is related to the low surface of the wings

Solving the equation for v₁ we have:

v_{1}=\sqrt{\frac{2(P_{2}-P_{1})}{\rho}+v_{2}^{2}} (3)

Now, we know that pressure P=F/A (force over area)

\Dela P=\frac{W}{A}=\frac{mg}{A}=\frac{1.9\cdot 10^{6}\cdot 9.81}{1.6\cdot 10^{3}} =11649.4 N/m^{2} (4)

Combining (3) and (4), we can find v1.

v_{1}=\sqrt{\frac{2(11649.4)}{1.23}+90^{2}}  

v_{1}=164.4 m/s  

I hope it helps you!  

6 0
3 years ago
U-235, the isotope of uranium commonly utilized in nuclear power plants, is ________.
ivanzaharov [21]

Answer:

Option C.

Explanation:

<u>Natural uranium is composed by 99.27% of U-238, 0.72% of U-235 and 0.005% of U-234</u>.

Of the isotopes of natural uranium, the U-235 is the most commonly utilized in nuclear power plants, but since it is only 0.72% of natural uranium it needs to be enriched before being used as fuel to sustain a nuclear fission reaction in nuclear power plants.    

<u>The U-238 is the most common and the heaviest of the three naturally occurring isotopes of uranium</u>.

So, from the above the correct option is the C.    

Have a nice day!

5 0
3 years ago
Read 2 more answers
Wave motion is characterized by two velocities: the velocity with which the wave moves in the medium (e.g., air or a string) and
Effectus [21]

Answer with Explanation:

We are given that  the mathematical form of wave

y(x,t)=Asin(kx-\omega t)

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In given mathematical form

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A=Amplitude

We know that

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The velocity v_y(x,t) of a point on the string as  a function of x and t is given  by

v_y(x,t)=-A\omega cos(kx-\omega t)

8 0
3 years ago
Which of the following statements describes nucleons?
Yuliya22 [10]
The correct answer is D.

A nucleon<span> is one of either of the two types of subatomic particles (neutrons and protons) which are located in the nucleus of atoms.
</span>

The total number of nucleon in the nucleus of an atom gives you an idea about the mass of that atom. In fact, one may refer mass number as nucleon number.

Simply put, nucleons are the particles that make nucleus of an atom and are held up together inside the nucleus due to nuclear force.

7 0
3 years ago
Read 2 more answers
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