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3 years ago

Please don't post anything unless it's the answer

Physics

1 answer:

Alja [10]3 years ago

7 0

52800000000000000000000000000000000000000000

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A Cessna 150 aircraft has a lift-off speed of approximately 125 km/h. What minimum constant acceleration does this require if th

aivan3 [116]

Answer:

Part a)

$a = 3.65 m/s^2$

Part b)

$t = 9.5 s$

Part c)

$v_f = 55.1 m/s$

Explanation:

Part a)

As we know that it starts from rest and moves on runway by total distance 165 m

so we will have

$v_f^2 - v_i^2 = 2ad$

$v_f^2 - 0 = 2(a)(165)$

$v_f = 125 km/h = 34.7 m/s$

now we have

$a = 3.65 m/s^2$

Part b)

Now for take off time we will have

$v_f - v_i = at$

$34.7 - 0 = 3.65 t$

$t = 9.5 s$

Part c)

$v_f = v_i + at$

$v_f = 0 + (3.65)(15.1)$

$v_f = 55.1 m/s$

7 0

3 years ago

Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which

notka56 [123]

Answer:

$a=5.66*10^{23} \frac{m}{s^2}$

Explanation:

In this case we will use the Bohr Atomic model.

We have that: $F=m*a$

We can calculate the centripetal force using the coulomb formula that states:

$F=k*\frac{q*q'}{r^2}$

Where K= $9*10^9 \frac{Nm^2}{C}$

and r is the distance.

Now we can say:

$m*a=k*\frac{q*q'}{r^2}$

The mass of the electron is = $9.1*10^{-31}$ Kg

The charge magnitud of an electron and proton are= $1.6*10^{-19}C$

Substituting what we have:

$[tex]a=\frac{9*10^{9}*(1.6*10^{-19} )*(2(1.6*10^{-19} ))}{9.1*10^{-31}*(2.99*10^{-11})^2 }$ [/tex]

so:

$a=5.66*10^{23} \frac{m}{s^2}$

3 0

3 years ago

(MICROWAVE) <br><br><br>Describe the device and its function.

andreev551 [17]

Answer: You use it to cook food so you can eat. put whatever kind of food you like in there and heat it up for how long you want and then it will beep when done. then you can eat!

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3 years ago

The slow, steady downhill flow of loose, weathered Earth materials is called A. flow. B. slide. C. creep. D. slump.

Art [367]

I beileve its b
Hope this helps☺

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3 years ago

Read 2 more answers

Se the IUPAC nomenclature rules to give the name for this compound - CaS.

Anna11 [10]

Answer:

Calcium sulphide

Explanation:

If we look at the compound, we will discover that it is an ionic compound. The compound is comprised of Ca^2+ and S^2-.

The cation Ca^2+ is the calcium ion while the anion S^2- is the sulphide ion hence the compound is rightly named calcium sulphide.

8 0

3 years ago