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Schach [20]
3 years ago
9

Which model could represent a neutral atom of boron?

Physics
2 answers:
givi [52]3 years ago
6 0

Answer:

1

Explanation:

JUST CHOOSE 1

UNO [17]3 years ago
5 0

Answer:

model 3

Explanation:

Boron with atomic number 5 will have 3 valence electrons

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marshall27 [118]
Hello so roughly the average height would vary between 10 cm and 4 inches and 20 cm = 7.87402 inches where 8 cm is one of th closest answers and 500mm = 19 in and 0.1 km = 3937 in hoped i helped
5 0
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Why would a pencil appear to be bent if half of it was embedded in diamond and the other half embedded in glass?
yan [13]
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7 0
3 years ago
Magnus is installing a resistor in series with the bimetallic switch. why is he doing this? a. to avoid archin.b. to make the th
sergiy2304 [10]

Answer:

d. to anticipate heat changes

Explanation:

Magnus installs the switch with a bimetal element, so that when the current in the circuit increases above the nominal value, the temperature in the conductor will likewise increase, the bimetal element has the ability to deform when significant temperature changes. In this way it anticipates dangerous current values deforming before and protecting the circuit.

4 0
4 years ago
Word ProNems:
siniylev [52]

Answer:

a:it speed up

b:it should be positive since final

velocity is larger than initial velocity

c:acceleration is approximately 4.5

m/s^2

Explanation:

initial velocity=u=4.47m/s

Final velocity=v=17.9m/s

Time=t=3 seconds

a:the car speed up since the velocity

increased

b:change in velocity is positive

because final velocity is larger than

initial velocity

17.9-4.47=13.43 m/s

c: acceleration=(v-u)/t

acceleration=(17.9-4.47)/3

acceleration=13.43/3

acceleration=4.5 m/s^2

7 0
3 years ago
Jumping up before the elevator hits. After the cable snaps and the safety system fails, an elevator cab free-falls from a height
noname [10]

Answer:

a)   I = 2279.5 N s , b) F = 3.80 10⁵ N, c)   I = 3125.5 N s  and d)  F = 5.21 10⁵ N

Explanation:

The impulse is equal to the variation in the amount of movement.

    I =∫ F dt = Δp

     I = mv_{f} - m v₀

Let's calculate the final speed using kinematics, as the cable breaks the initial speed is zero

   v_{f}² = V₀² - 2g y

   v_{f}² = 0 - 2 9.8 30.0

   v_{f} = √588

   v_{f} = 24.25 m/s

a) We calculate the impulse

   I = 94 24.25 - 0

   I = 2279.5 N s

b) Let's join the other expression of the impulse to calculate the average force

   I = F t

  F = I / t

  F = 2279.5 / 6 10⁻³

  F = 3.80 10⁵ N

just before the crash the passenger jumps up with v = 8 m / s, let's take the moments of interest just when the elevator arrives with a speed of 24.25m/s down and as an end point the jump up to vf = 8 m / n

c)     I = m v_{f} - m v₀

       I = 94 8 - 94 (-24.25)

       I = 3125.5 N s

d)     F = I / t

       F = 3125.5 / 6 10⁻³

       F = 5.21 10⁵ N

7 0
3 years ago
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