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aliya0001 [1]
3 years ago
14

•Would a moving fan have energy? Why or why not.

Physics
1 answer:
Pepsi [2]3 years ago
7 0
Moving fan has rotational kinetic energy
Non moving fan has no energy since it is in rest
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marusya05 [52]

solution:

radius of steel ball(r)=5cm=0.05m

density of ball =8000kgm

terminal velocity(v)=25m/s^2

density of air( d) =1.29 kgm

now

volume of ball(V)=4/3pir^3=1.33×3.14×0.05^3=0.00052 m^3

density of ball= mass of ball/Volume of ball

or, 8000=m/0.00052

or, m=4.16 kg

weight of the ball (W)= mg=4.16×10=41.6 N

viscous force(F)=6 × pi × eta × r × v

=6×3.14×eta×0.05×25

=23.55×eta

To attain the terminal velocity,

Fiscous force=Weight

or, 23.55× eta = 41.6

or, eta = 1.76

whete eta is the coefficient of viscosity.

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3 years ago
Pwease help me with thesse three
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Answer:

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What are the benefits of solar cookers?
Elanso [62]

Answer:

Using clean, renewable, and readily available solar energy as fuel.

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Explanation:

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Answer:

Explanation:

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