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Alexus [3.1K]
3 years ago
14

Find the measure of angle x in the figure below:

Physics
1 answer:
Serga [27]3 years ago
4 0

Answer:

51°

Explanation:

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Help please!!!
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5 years worth of work (aka all of the homework i currently have)

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A wildebeest runs with an average speed of
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How many seconds did the wildebeest run??
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Is the Force balanced or unbalanced?
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Answer:

1. balanced

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If gravity between the Sun and the Earth suddenly vanished, Earth would continue moving
zmey [24]

Answer:

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Explanation:

4 0
3 years ago
A motor has an armature resistance of 3.75 Ω . Part A If it draws 9.10 A when running at full speed and connected to a 120-V lin
bulgar [2K]

Back emf is 85.9 V.

<u>Explanation:</u>

Given-

Resistance, R = 3.75Ω

Current, I = 9.1 A

Supply Voltage, V = 120 V

Back emf = ?

Assumption - There is no effects of inductance.

A motor will have a back emf that opposes the supply voltage, as the motor speeds up the back emf increases and has the effect that the difference between the supply voltage and the back emf is what causes the current to flow through the armature resistance.

So if 9.1 A flows through the resistance of 3.75Ω then by Ohms law,

The voltage across the resistance would be

v = I x R

  = 9.1 x 3.75

  = 34.125 volts

We know,

supply voltage = back emf + voltage across the resistance

By plugging in the values,

120 V = back emf + 34.125 V

Back emf = 120 - 34.125

                = 85.9 Volts

Therefore, back emf is 85.9 V.

4 0
3 years ago
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