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Thepotemich [5.8K]
3 years ago
8

What would the velocity of a wave traveling in a medium change?

Physics
1 answer:
zloy xaker [14]3 years ago
8 0
Both the speed and the direction of a wave could change
at the beginning and end of the medium, when the wave
crosses from one medium into a different one. 

But while the wave is moving from one place to another place
in the same medium, its speed and direction don't change. 
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The binding of acetylcholine to its receptor at the neuromuscular junction causes the opening of a
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Convert the following angles in degrees to radians:<br><br>(a) 300°<br>(b) 18°<br>(c) 105°​
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b) 0.314159

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A single-phase electrical load draws 600KVA at 0.6 power factor lagging. a) Find the real and reactive power absorbed by the loa
Whitepunk [10]

Answer:

(a). The reactive power is 799.99 KVAR.

(c). The reactive power of a capacitor to be connected across the load to raise the power factor to 0.95 is 790.05 KVAR.

Explanation:

Given that,

Power factor = 0.6

Power = 600 kVA

(a). We need to calculate the reactive power

Using formula of reactive power

Q=P\tan\phi...(I)

We need to calculate the \phi

Using formula of \phi

\phi=\cos^{-1}(Power\ factor)

Put the value into the formula

\phi=\cos^{-1}(0.6)

\phi=53.13^{\circ}

Put the value of Φ in equation (I)

Q=600\tan(53.13)

Q=799.99\ kVAR

(b). We draw the power triangle

(c). We need to calculate the reactive power of a capacitor to be connected across the load to raise the power factor to 0.95

Using formula of reactive power

Q'=600\tan(0.95)

Q'=9.94\ KVAR

We need to calculate the difference between Q and Q'

Q''=Q-Q'

Put the value into the formula

Q''=799.99-9.94

Q''=790.05\ KVAR

Hence, (a). The reactive power is 799.99 KVAR.

(c). The reactive power of a capacitor to be connected across the load to raise the power factor to 0.95 is 790.05 KVAR.

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