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3 years ago

8

A car is travelling along a straight road with speed v measured in m/s. The power P measured in watts required to overcome exter

nal forces opposing the motion is given by the p=CV+KV³, where c and k are constants. use base units to obtain SI unit for constant K

1 answer:

mojhsa [17]3 years ago

5 0

Answer:

K = kg/m

Explanation:

as velocity has units of m/s V³ has units of m³/s³

power has units of J/s = N•m/s = kg•m/s²•m/s = kg•m²/s³

kg•m²/s³ = K(m³/s³)

K = kg•m²/s³•s³/m³

K = kg/m

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3 years ago

A multimeter in an RL circuit records an rms current of 0.600 A and a 50.0-Hz rms generator voltage of 110 V. A wattmeter shows

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Answer:

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Explanation:

(a)

The expression for the impedance is as follows:

$Z=\frac{V_rms}{I_rms}$

Here, $V_rms$ is the rms voltage and $I_rms$ is the rms current.

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Therefore, the impedance in the circuit is $Z=183.33\Omega$ .

(b)

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Here, $P_{a}$ is the average power and R is the resistance.

Calculate the resistance by rearranging the above expression.

$R=\frac{P_{a}}{I_{rms}^{2}}$

Put $P_{a}=14W$ and

$R=\frac{14}{{0.600}^{2}}$

$R=38.89\Omega$

Therefore, the resistance is $R=38.89\Omega$ .

(c)

The expression for the impedance is as follows;

$Z^{2}=R^{2}+X_{L}^{2}$

Here, $X_{L}$ is the inductive reactance.

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$X_{L}=179.16\Omega$

The expression for the inductive reactance in terms of frequency is as follows;

$X_{L}=2\pi fL$

Here, L is the inductance.

Calculate the inductance by rearranging the above expression.

$L=\frac{X_{L}}{2\pi f}$

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According to these definitions

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in a chemical reaction where electrons mix.

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3 years ago

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