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3 years ago

5

Two similar fans are operating in a room. Fan 1 makes a squeaking noise while running. Fan 2 is silent.

2 answers:

REY [17]3 years ago

8 0

Answer:

a

Explanation:

because it has more energy

GaryK [48]3 years ago

5 0

Answer:

d fan 2 becuase Fan 1 converts some energy into sound

Explanation:

Why is the awnser D you ask me?

Well its becuase sound is energy and to make sound you must use other energy. fan 1 uses some of its kinetic energy and converts it to sound and slows down becuase it waste kinetic energy for sound. on the other hand fan 2 converts all its electrical energy (of course it emits some infered light) into kinetic energy.

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spin [16.1K]

" This manual applies to Compact Liquid <span>Fuel Pumps & </span>Dispensers<span> The </span>liquid pressure<span> range is from 0.5 - 20m These totals </span>can<span> be displayed by </span>pressing<span> the CLEAR </span>button<span> on the preset keypad five times in When connecting to sites </span>powered<span> by. "</span>

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3 years ago

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Water enters a student's house 10.0 m above the ground through a pipe with a cross section area of 1.00 x 10-4m2 at ground. Insi

dezoksy [38]

Answer:

(a). V₁ = 10m/s (velocity inside the house), V₂ = 5m/s (velocity at ground level)

(b). P₂ = 236500 Pa

Explanation:

This is quite straight-forward so let us begin by defining the terms given.

Given that;

The cross-section area inside the student's house A₁ = 0.50 0.50 x 10-4m2.

Let us make the velocity of water inside the house be V₁

such that the Volume of water entering the per second is = A₁V₁

Therefore, in 90sec:

45 L = 90 A₁V₁

V₁ = 45 * 10⁻³m³ / 90*0.5*10⁻⁴

V₁ = 10m/s (velocity of water inside the house)

From the continuity equation we have that;

A₁V₁ = A₂V₂

0.5*10⁻⁴ * 10 = 1*10⁻⁴ V₂

V₂ = 5m/s (velocity at ground level)

(b). We are told to calculate the water pressure in the pipeline at the ground level.

Using Bernoulli's equation;

P₁ + pgh₁ + 1/2PV₁² (inside) = P₂ + pgh₂ + 1/2PV₂² (ground level)

1.01*10⁵ + 1000*9.8*10 + 1/2*1000*(10)² = P₂ + 0 + 1/2*1000*(5)²

P₂ (pressure) = 1.01*10⁵Pa

Therefore we have;

101000 + 98000 + 50000 = P₂ + 12500

P₂ = 236500 Pa

cheers I hope this helped !!

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2 years ago

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3 years ago

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pashok25 [27]

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3 years ago

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