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Oxana [17]
3 years ago
12

Which statement(s) correctly compare the masses of protons, neutrons, and electrons?

Physics
1 answer:
Ostrovityanka [42]3 years ago
3 0
Electron<span>. the central part of an atom containing </span>protons<span> and </span>neutrons<span> ... which of the following is necessary to calculate the atomic </span>mass<span> of an element? ... which of the </span>statements correctly compares<span>the relative size of an ion to its neutral atom?</span>
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An airplane in the process of taking off travels with a speed of 80 m/s at an angle of 15° above the horizontal. What is the gro
9966 [12]

Answer:

Option C

Explanation:

given,

velocity of airplane = 80 m/s

angle with the horizontal = 15°

speed of the ground= ?

when the plane is taking off the horizontal component of the velocity is v cosθ

so,      

        ground speed of the airplane is = v\times cos\theta

                                                              = 80 \times cos 15^0

                                                           v  =  77.27 m/s

horizontal velocity of the air plane comes out to be 77.27 m/s ≅ 77 m/s

so, the correct option is Option C

5 0
3 years ago
Which calculation is an example of velocity ? 10m/s 10/Ms to the right 10 m to the right 10​
stepan [7]

Answer:

10m/s to the right

5 0
3 years ago
A NFL linebacker runs the 100m sprint in 12s. What is his final velocity?
zaharov [31]

Answer:

Final velocity of NFL line backer is 16.67 m/s.

Explanation:

From the question, we have following data about the NFL line backer:

Initial Speed of line backer = Vi = 0 m/s (Since, he starts from rest)

Distance covered by NFL line backer = s = 100 m

Time taken by the NFL line backer to complete 100 m sprint = t = 12 s

Acceleration of NFL line backer during sprint = a

Final Velocity of NFL line backer = Vf = ?

First we need to find the acceleration of the NFL line backer. For that purpose we will use 2nd equation of motion:

s = (Vi)(t) + (0.5)at²

using values:

100 m = (0 m/s)(12 s) + (0.5)(a)(12 s)²

100 m/72 s² = a

a = 1.39 m/s²

Now, we use 1st equation of motion to find Vf:

Vf = Vi + at

Vf = 0 m/s + (1.39 m/s²)(12 s)

<u>Vf = 16.67 m/s</u>

7 0
3 years ago
Sort the phrases based on whether they represent kinetic energy or potential energy.
alexgriva [62]

Answer:

energy of disconnected

Explanation:

5 0
3 years ago
Read 2 more answers
A toy plane with a mass of 20 kg is flying at 10 m/s. What is its kinetic energy?
gladu [14]

Answer:

\boxed {\boxed {\sf A. \ 1000 \ Joules}}

Explanation:

Kinetic energy can be found using the following formula.

E_k=\frac{1}{2}mv^2

where <em>m</em> is the mass and <em>v</em> is the velocity.

The mass of the toy plane is 20 kilograms and the velocity is 10 meters per second.

m= 20 \ kg \\v= 10 \ m/s  \\

Substitute the values into the formula.

E_k=\frac{1}{2}(20 \ kg) (10 \ m/s)^2

Solve the exponent first.

  • (10 m/s)²= 10 m/s *10 m/s= 100 m²/s²

E_k=\frac{1}{2} (20 \ kg) (100 \ m^2/s^2)

Multiply the last two numbers together.

E_k= \frac{1}{2}(2000 \ kg*m^2/s^2)

Multiply by 1/2 or divide by 2.

E_k= 1000 \ kg*m^2/s^2

  • 1 kilogram square meter per square second is equal to 1 Joule.
  • Our answer of 1000 kg*m²/s² is equal to 1000 Joules

E_k= 1000 \ J

The kinetic energy of the toy plane is <u>1000 Joules</u>

4 0
3 years ago
Read 2 more answers
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