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Marina86 [1]
3 years ago
6

For Al, its atomic number is 13 and its mass number is 27. How many neutrons does it have?

Physics
1 answer:
ira [324]3 years ago
6 0

Answer:

B.14 your welcome!

Explanation:

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An airplane touches down on the runway with a speed of 70 m/s2. Determine the airplane after each second of its deceleration.
ivann1987 [24]
<span>vf^2 = vi^2 + 2*a*d
---
vf = velocity final
vi = velocity initial
a = acceleration
d = distance
---
since the airplane is decelerating to zero, vf = 0
---
0 = 55*55 + 2*(-2.5)*d
d = (-55*55)/(2*(-2.5))
d = 605 meters


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5 0
3 years ago
As you tune your radio to a higher frequency, from 88.5 FM to 103.3 FM, the wavelength of the wave that you are tuning in
olga_2 [115]

the relation that relates the speed of wave, frequency of wave and wavelength is given as

wavelength = \frac{speed}{frequency}

the speed of wave in a medium remains constant. hence the wavelength is inversely related to the frequency of wave.

that means, as the frequency is increased, the wavelength decreases and vice versa.

hence the correct choice is

B decreases

3 0
2 years ago
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Atoms can join together to form ______ substance​
ELEN [110]

Answer:

Molecules

Explanation:

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7 0
2 years ago
If you wish to observe features that are around the size of atoms, say 5.5 × 10^-10 m, with electromagnetic radiation, the radia
Tanya [424]

Answer:

a) 5.5×10^17 Hz

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Explanation:

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c= λ f and c= 3×10^8 ms-1

f= c/λ

f= 3×10^8/5.5 × 10^-10

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The electromagnetic wave is visible light

3 0
3 years ago
Which term describes when situations, events, or people make demands on your body and mind
mars1129 [50]
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