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Ulleksa [173]
2 years ago
11

25. a small container of water is placed on a turntable inside a microwave oven, at a radius of 12.0 cm from the center. the tur

ntable rotates steadily, turning one revolution in each 7.25 s. what angle does the water surface make with the horizontal?
Physics
1 answer:
Oksanka [162]2 years ago
4 0

The angle that the water surface make with the horizontal is 0.527°.

<h3>How to calculate the angles?</h3>

The water vapor moves at speed. Therefore,

v = 2πr/T = (2 × π × 0.120)/7.25

= 0.104m/s

Also, the top layer of water deals a downward force if gravity which will be:

= mv²/r = 0.104/0.12 = 0.0901

There, the angle will be:

= tan(0.0901/9.8)

= 0.527°

In this case, the angle that the water surface make with the horizontal is 0.527°.

Learn more about angles on:

brainly.com/question/25716982

#SPJ4

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Answer:

775.48 W

Explanation:

given,

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length of the disk = 0.4 m

T₁ = 450 K         T₂ = 450 K      T₃ = 300 K

\dfrac{d}{r_1}=\dfrac{0.4}{0.3} = 1.33

now,

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F₁₃ = 1 - 0.265 = 0.735

now,

net rate of radiation heat transfer from the disk to the environment:

=\dot{Q_{1-3}+Q_{2-3}} = 2 \dot{Q_{1-3}}

       = 2 F₁₃ A₁ σ (T₁⁴ - T₃⁴)

       = 2 x 0.735 x π x (0.3)² x (5.67 x 10⁻⁸ W/m²) (450⁴ - 300⁴)

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2 years ago
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