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WARRIOR [948]
3 years ago
15

1. Given a list of atomic model descriptions:

Physics
1 answer:
laiz [17]3 years ago
8 0

Answer: A: electron shells outside a central nucleus

B: hard, indivisible sphere

C: mostly empty space

Which list of atomic model descriptions represents

the order of historical development from the earliest

to most recent?

Explanation:

3

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A 5.0-kg box has an acceleration of 2.0 m/s2 when it is pulled by a horizontal force across a surface with μK = 0.50. Find the w
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Answer:a) 34.5 N; b) 24.5 N; c) 10 N; d) 1J

Explanation: In order to solve this problem we have to used the second Newton law given by:

∑F= m*a

F-f=m*a where f is the friction force (uk*Normal), from this we have

F= m*a+f=5 Kg*2 m/s^2+0.5*5Kg*9.8 m/s^2= 34.5 N

then f=uk*N=0.5*5Kg*9.8 m/s^2= 24.5N

the net Force = (34.5-24.5)N= 10 N

Finally the work done by the net force is equal to kinetic energy change so

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When have you experienced an increase in kinetic<br> energy within a system?
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If a man starts running on a boat with an acceleration a with respect to the boat, there is no external force that acts on the Boat+Man system

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2 years ago
When point charges q = +8.4 uC and q2 = +5.6 uC are brought near each other, each experiences a repulsive force of magnitude 0.6
Stella [2.4K]

Answer:

it is separated by 80 cm distance

Explanation:

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here we know that

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now we have

F = \frac{kq_1q_2}{r^2}

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r = 0.8 m

so it is separated by 80 cm distance

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Explanation:

O

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