No. See related question
because the gravety is the same and it carrys all the mass from from the sun and is is so used to rataing with the sun it makes all the parts of the sun at the same past of speed. In fact, because it's gaseous, the Sun doesn't all rotate at the same speed.
It's not a solid. It's made of hot gases.
No.
In that case, it would show the Sun the same face all the time. In parts of the Earth it would be day all the time, in other parts it would be night all the time.
when all tires are inflated properly, they each rotate at the same speed. there are sensors that monitor wheel speed and when one loses air pressure, it rotates at a slower speed at with the sensor then senses and sends that signal to the computer
Assuming the question is asking about the Earth's rotation, it depends upon how you measure speed. If you measure angular velocity, then yes, every point on earth rotates at the same speed. If you measure linear velocity, then no, points near the equator rotate faster than points near the poles. Still in linear velocity, points at higher altitude rotate slightly faster then points at the bottom of the deep ocean.
As best we can tell, yes. If Maxwell's Equations apply in all parts of our Universe, then the vacuum propagation speed of EM radiation (ie, light) will be the same in all parts of our Universe. We have no reason to think that our small portion of our Universe has different physical laws than other parts.
no they not have the same speed
Orbit the sun and rotate on their axis.
they all have the same speed
All of them. A few satellites are tidally locked to their primary (luna for example), but all the planets rotate.
The speed of all sounds is the same in the same medium.