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zimovet [89]
2 years ago
8

Why do we use atomic models?

Physics
1 answer:
vlabodo [156]2 years ago
3 0
Models help us to understand systems and their properties
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What happens to the current of a series circuit when the e.m.f of the power supply is doubled?
juin [17]

Answer:

current doubles

Explanation:

V = IR

so as v doubles I doubles

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3 years ago
football game customarily begins with a coin toss to determine who kicks off. The referee tosses the coin up with an initial spe
LuckyWell [14K]

Answer:

1.28 m

Explanation:

You are given the initial speed that is 5 m/s. Since the coin is sent upwards, this means that the speed is positive according to the co-ordinate system in the y axis. Additionally, there is the gravity that curbs the coin in the opposite direction making the final speed becomes zero at the highest point, so the gravity takes negative sign.

So, from the explanation we have:

Vo = 5 m/s

V = 0 m/s

a = -9.8 m/s^2

so, we use the following equation to find y (hight)

V^2 = Vo^2 + 2ay

y = V^2 - Vo^2 / 2a

y = (0 m/s)^2 - (5 m/s)^2 / 2*(-9.8 m/s^2)

y = - (25 m^2 / s^2) / -19.6 m /s^2

y = 1.28 m

3 0
3 years ago
In a simple 2-bulb series circuit, why does the bulb light when you close the switch?
Nataly [62]

Answer:

Because closing the switch completes the circuit.

Explanation:

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The orbitals can be found by counting down the _____.
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I think it's B for electrons
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When light travels through a small hole, it appears to an observer that the light spreads out, blurring the outline of the hole.
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wave theory

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