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kondaur [170]
1 year ago
12

What is the magnitude of the force between a 25μC charge exerts on a -10μC charge 8.5cm away?

Physics
1 answer:
Reil [10]1 year ago
7 0

Answer:

Force,

F =  \frac{kQ_{1} Q_{2} }{ {r}^{2} }  \\ F =  \frac{(9 \times  {10}^{9}) \times (25 \times  {10}^{ - 6}) \times (10 \times  {10}^{ - 6}  ) }{ {(0.85)}^{2} }  \\  \\ F =  3.114 \: newtons

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If the temperature of an ideal gas is increased from 200 K to 600 K, what happens to the rms speed of the molecules? (a) It incr
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Answer: (d) It is !3 times the original speed.

Explanation: The rms speed of a gas is related to its temperature by the formulae below;

U(r.m.s) =√(3RT)/M

Where;

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R represents the gas constant.

M represents the molar mass of the gas.

Therefore, if the temperature increases from 200k to 600k

The temperature has then increased by a factor of 3,

However, we must note that temperature in the formulae is included in the square-root

Recall,

U(r.m.s) =√(3RT)/M

Consequently, temperature (T) can now be represented by (3T).

The inference drawn from this is that the root-mean-square speed would increase by a factor of √3

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7 0
2 years ago
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2 years ago
An 18-cm-long bicycle crank arm, with a pedal at one end, is attached to a 20-cm-diameter sprocket, the toothed disk around whic
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Answer:

Part a)

a = 0.056 m/s^2

Part b)

L = 7.85 m

Explanation:

Part a)

Angular speed of the pedal is changing from 60 rpm to 90 rpm in 10 s

so the angular acceleration is given as

\alpha = \frac{\omega_2 - \omega_1}{\Delta t}

so we will have

\alpha = \frac{2\pi(\frac{90}{60}) - 2\pi(\frac{60}{60})}{10}

\alpha = 0.314 rad/s^2

now the tangential acceleration of the pedal is given as

a = r \alpha

a = 0.18 \times 0.314

a = 0.056 m/s^2

Part b)

Total angular displacement made by the sprocket in the interval of 10 s is given as

\theta = \frac{\omega_f + \omega_i}{2} t

\theta = \frac{2\pi (\frac{90}{60}) + 2\pi (\frac{60}{60})}{2}(10)

\theta = 78.5 radian

now length of the chain passing over it is given as

L = R\theta

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L = 7.85 m

6 0
2 years ago
Power is __________________. Power is __________________. the work done by a system the force required to push something the spe
DaniilM [7]

Answer:

The rate at which the energy of a system is transformed

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