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Here is a site on the net that has a cute thing to look at this: http://aspire.cosmic-ray.org/labs/star_life/hr_interactive.html This would be for a star of 1 solar mass. And this for a 1 solar mass star: http://wind.cc.whecn.edu/~marquard/astronomy/sunlike.htm...

The way to make results: - reliable: Take several results, at least three. Discard those that are a long way away from the others and do more results so you get at least 3 that are closer together. - valid: Use a control and control your variables. Keep all but one thing constant and then...

They have computer models of the motion of the moon and have used tricky maths to do this. They can predict exactly where and when the moon will be and where the earth will be for these eclipses. They have even done this for hundreds of years into the future. There is a great website I like to...

Hi Webby, Initially I would refer you to the following sites: http://www.creationontheweb.com/content/view/3873/ http://www.answersingenesis.org/home/area/qa.asp These two sites hold scientifically based articles on the things you mention and MORE. I just ask that you approach the issue open...

No, there is only certain published iterpretation of evidence that supports that view. There is actually a lot of research that supports the other view but mainstream publications will not touch it because they believe it is wacko science (mainly because it interferes with their notion of the...

Using the Jacaranda HSC text book - Black Body radiation is the electromagnetic radiation emitted by a "black body" at a particular temperature. It is distributed across the entire E/M spectrum but it is not distributed evenly across the E.M spectrum. There is a peak for a particular wavelength...

Whether it has been orbiting for billions of years is open for discussion. The actual age of the universe is debated by two sides to be either billions of years or just several thousand years. Anyway, Wikipedia seems to indicate that the orbit or the moon is slightly increasing each year, not...

Ich freue mich auf diesen Sommer, besonders auf die Sommerferien. (Weihnachtstag macht immer viel Spaß und danach ein Kirchjugendcamp und Ferien bei meinen Eltern.) Aber du hast recht, vielleicht wird es dieses Jahr heißer als immer und wir haben hier zu Hause keine Klimaanlage. Was tun Sie...

There would also be other components in the lab power supplies. The current levels and voltage levels are both dropped to safer amounts. If you are interested more in how they work, why not ask your teacher or school lab technician if you can have a look at the user manual for the power...

OK, when you first look at the question, the rocket is 500kg OF WHICH 300kg is fuel. So, the initial acceleration will be done using a mass of 500kg. BUT the 300kg of fuel will be eventually all used up, hence the final mass of the rocket will be only 200 kg. So, the MAXIMUM acceleration the...

Hi there. What sort of help specifically are you looking for? Risk analysis - you could do a dot pot thing. Identify a hazard and state how you can address it in your experiment. Validity - you would be minimising error and taking multiple readings to ensure you are discounting anomalous...

Certainly a very interesting question you have proposed. From a quick look around the place I can only say the following: - The nucleus of an atom is only stable when there is a particular proton:neutron ratio. Otherwise there will be radioactive decay until a stable nucleus is reached. - The...

Here you go, a link about the mix-up, although I note at the bottom of the Wikipedia page there is a link to another site which suggests that the metric mix-up may not have been the problem. http://en.wikipedia.org/wiki/Mars_Climate_Orbiter And another note about UNITS! This is why you should...

There are deadlines to pull out of courses and not incur the HELP/HECS and Uni fees and a fail. However, no study you do is ever wasted. If you complete a subject in one degree field, it can be used as a credit toward another degree if it is appropriate. However, starting Uni is very confusing...

Doing 12 Units is a good idea, that way if you do really bad in one subject on the day you have that "back up" subject. Otherwise, doing just the 10 you are locked into those counting toward your UAI. Personally, I did 12 Units. I did 10 that were strong and my last 2 were a "fun" subject, that...

Indeed, don't lock yourself into 4U in case you want to drop back at some stage. Make sure you still do all the 2U assessments so you can make that final decision as late as you like. You will still need to cover all the 2U topics at any rate to then do the 3U topics, so do all the assessments...

It is understandable that you may be doing better in 4U over 3U (Ext2 over Ext1) since there are some topics in 4U that are not in 3U at all - eg complex numbers. I would look at your 3U problems and see if you can target what it is exactly that is bringing you down. Is it - understanding of...

The Law of Conservation of Energy still applies in this case because Energy is not created nor destroyed just converted. Binding Energy is part of the Strong Nuclear Force and thus involves the conversion of mass to energy. However, when mixing chemicals, you are converting potential chemical...

As far as I can determine (and can I say this is a really interesting question), constants are there to establish an equality between values. We can definitely say that certain variables are proportional is some way, eg that the Energy of a photon is proportional to its frequency. However, to...

Unlike in 3U maths where you can see where the answer may lie, 4U is "suck it and see", ie try something that you think may work and see where it leads. In this respect it does require some intuition and a very comprehensive working knowledge of the formulae and concepts from 2U and 3U maths...