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2 years ago

A resistance of 30Ω is placed in a circuit with a 90 volt battery. What current flows in the circuit?

Engineering

1 answer:

Svetlanka [38]2 years ago

6 0

Answer:

30 Amperes

Explanation:

if V ⇒ voltage

I ⇒ current

R ⇒ resistance

V = IR

90 = I x 30

90/30 = I

3 = I

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2 years ago

Airflow through a long, 0.15-m-square air conditioning duct maintains the outer duct surface temperature at 10°C. If the horizon

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The complete Question is:

Airflow through a long, 0.15-m-square air conditioning duct maintains the outer duct surface temperature at 10°C. If the horizontal duct is uninsulated and exposed to air at 35°C in the crawlspace beneath a home, what is the heat gain per unit length of the duct? Evaluate the properties of air at 300 K. For the sides of the duct, use the more accurate Churchill and Chu correlations for laminar flow on vertical plates.

What is the Rayleigh number for free convection on the outer sides of the duct?

What is the free convection heat transfer coefficient on the outer sides of the duct, in W/m2·K?

What is the Rayleigh number for free convection on the top of the duct?

What is the free convection heat transfer coefficient on the top of the duct, in W/m2·K?

What is the free convection heat transfer coefficient on the bottom of the duct, in W/m2·K?

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- 7709251 or 7.709 ×10⁶

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Explanation:

Find the given attachments for complete explanation

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3 years ago