Recent content by Mazin Nasralla

Homework Statement The physical size of a single LOFAR station, operating at 150MHz is about 50m. Estimate the number of pixels which would be needed to map the full primary beam if one wished to include all LOFAR stations (maximum baseline ~ 800 km) at full resolution. Homework Equations...

Thanks. I understood both statements in of themselves. Hopefully when I reconsider the whole phenomena it will fit together. I shall leave you in peace now!

If the only force is gravity then why doesn't all matter accelerate in its direction? I understand that the matter has angular momentum by virtue of its rotation, but could not the matter move inwards, and the whole system rotate faster conserving angular momentum. If the matter remains at...

In the accretion plane, the gravitational force is at a low because of the centripetal acceleration, and therefore matter tends to accumulate in that plane? The mass ends up where the force moves it so the conclusion must be that forces are directing the mass to this horizontal plane. Gravity...

Thanks for replying. So in the accretion disk, the matter outside the plane of rotation experiences a higher gravitational force and is either pulled towards the disk or the central star leaving behind a disk, the region where the gravitational force is at a low?

Hello, This problem has probably been done before in different guises but I am struggling, and hoping for help. I am struggling to understand a phenomena which I am assuming is one and the same: Equatorial Bulge of the Earth Flat Plane in which the Planets rotate Protoplanetary disks are flat...

I like that explanation. I found a snippet on wiki under synodic period which confirms the formula. https://en.wikipedia.org/wiki/Orbital_period#Synodic_period Thanks very much to all who contributed. I am happy now, and I know a little bit more!

Thanks that's even simpler! The first equation has pi as a factor on both sides and has a constant which could be awkward - especially for me, but it hints at where it came from. How do you remember that, or derive it. Willem's equation makes sense. I can see where it comes from with...

Thanks Willem. I realized after posting how to do it.

I was given a question which I have worked out, but not to my satisfaction... "if the inclination of Earth and Venus orbit was the same, how often would the transit occur?" I am given 4 options and I have got the right answer, but I did it by trial and error, and I am sure that there must be a...

I was trying to figure this out too. But I got it as soon as I came across your explanation. It's impossible to have a geostationary orbit above any other plane than the equator because the satellite would experience a force towards the Earth's centre taking it away from it's geosynchronous...

Thanks for the reply but I don't understand 1) I know that NASA ESA use planetary orbits to accelerate their craft. Your argument would hold if the planet was stationary. Then the gravity field would be uniform and what speed the craft gained on approach I would be lost on exit, but if the...

Hello, I have been studying XRays recently in a general science course. It's about A Level standard but I want to take my interest further. Anyway to the point. I thought I understood the release of XRays when an electron is slowed as it ploughs into a tungsten anode in an X-Ray Tube...