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mart [117]
3 years ago
10

The first four steps in the formation of the sun are listed below.

Physics
2 answers:
kati45 [8]3 years ago
7 0
<span>The next logical step in the formation of the sun would be choice B. Nuclear fusion of gases takes place in the center of the nebula. </span>
Airida [17]3 years ago
6 0
(B)Option b is your answer..........
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Please help with any of them!!!!!!
Law Incorporation [45]
Its to blury for me to see it 
5 0
3 years ago
You and a friend both leave the same restaurant to drive home. You are heading directly west at 30 miles per hour and he or she
steposvetlana [31]

Answer:

\frac{dAB}{dt} = = 50 miles/ hour

Explanation:

let A represent me and B represent my friend

A speed\frac{dOA}{dt}=30 m/hr toward west

B speed\frac{dOB}{dt} =40 m/hr toward south

after 1/2 hr

total distance cover by A =1/2 * 30 miles = 15 miles

total distance by B = 1/2*40 miles = 20 miles

now from figure

AB = \sqrt{(15^2+20^2)} = 25 miles

AB^2 =OA^2+ OB^2

Differentiate above equation

2AB\frac{dAB}{dt} = 2OA\frac{dOA}{dt} +2OB\frac{dOB}{dt}

25*\frac{dAB}{dt} = 15*30 +20*40

\frac{dAB}{dt} = \frac{1250}{25}

\frac{dAB}{dt} = = 50 miles/ hour

5 0
3 years ago
Read 2 more answers
A flywheel of diameter 1.2 m has a constant angular acceleration of 5.0 rad/s2. the tangential acceleration of a point on its ri
vodka [1.7K]
We know that tangential acceleration is related with radius and angular acceleration according the following equation:  
at = r * aa  
where at is tangential acceleration (in m/s2), r is radius (in m) aa is angular acceleration (in rad/s2)  
So the radius is r = d/2 = 1.2/2 = 0.6 m  
Then at = 0.6 * 5 = 3 m/s2  
Tangential acceleration of a point on the flywheel rim is 3 m/s2
5 0
2 years ago
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
When the heat source is removed from a fluid, convection currents in the fluid will eventually ____________then stop.
Blizzard [7]

When the heat source is removed from a fluid, convection currents in the fluid will eventually distribute heat uniformly throughout the fluid.  When all of the fluid is at the same temperature, convection currents will stop.

5 0
3 years ago
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