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Juliette [100K]
3 years ago
15

Most stars are a.brown fs b.main sequence c.white dwarfs d.pulsars

Physics
1 answer:
trapecia [35]3 years ago
3 0
I believe the answer is B. Main sequence 
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When you look ahead while driving, it is best to:
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A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1
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Trucks can be run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 20
Genrish500 [490]

Answer:

The time it can operate between chargins in minutes is

t=102.8 minutes

Explanation:

Given: m=500kg, r=1.0m, w=200\pi rad/s

a). The rotational kinetic energy

K_R=\frac{1}{2}*I*w^2

I=\frac{1}{2}*m*r^2

I=\frac{1}{2}*500kg*(1.0m)^2

I=250 kg*m^2

K_R=\frac{1}{2}*250kg*m^2*(200\pi rad/s)^2

K_R=49.348x10^6J

b). The power average 0.8kW un range time can be find

P=\frac{K_R}{t'}

Solve to t'

t=\frac{K_R}{P}

t=\frac{49.348x10^6}{0.8x10^3w}=6168.5s

t=6168.5s\frac{1minute}{60s}=102.8 minutes

3 0
3 years ago
What is the average of the speed of light
Maslowich
The average speed of light is 186,000 mph
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3 years ago
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