Recent content by Login

A Quantum Mechanics course I am taking is dumping a lot of material on us in a very short time. It's difficult to talk to the professor, and the only assigned class notes are PowerPoint slides which are not clear. So I am looking for a textbook that I can use to teach myself the material. In...

I did a prac where we tried to calculate the rydberg constant for hydrogen. We had a hydrogen lamp and we used a spectrometer that was hooked up to a photomultiplier tube to detect the wavelengths of light corresponding to the balmer series. In one section I need to write up a brief summary of...

I probably should have said that this is a section of a prac, for the entire prac we are only supposed to use; mean, standard deviation, error on a slope and the error combinations: \Delta{Z}=\Delta{X}+\Delta{Y} For quantities which are added/subtracted...

Homework Statement We needed to measure the temperature of a bucket of water using a thermometer which can be read to 0.1°C. Each group would do a single measurement, the data from five groups (including our own) was to be averaged with the uncertainty stated. The data collected was: 19.5...

ah okay

I'm a bit confused, is it acceptable to have more than two premises in a valid syllogism?

Wow, after I just posted I literally read two more pages and Gensler started to go into this, turns out it is because A may be empty.

But if we take: A = fairies B = things that have wings C = things that have magic wands then some B is C only if fairies exist, if they don't then there isn't necessarily something that's common to both B and C so I can't say with certainty that some B is C.

Never mind, I think I figured it out. Is it because there isn't necessarily anything in A?

I'm pretty sure. Gensler says the star test works by putting a star above any distributed letters in the premises and any non-distributed letters in the conclusion. The test says it is valid only if: 1) each capital letter is starred exactly once and 2) there is exactly one letter on the right...

I'm reading a book by Harry J. Gensler in which he introduces his 'star test' for checking whether or not a syllogism is valid. According to the star method the premises; all A is B all A is C has no valid conclusion. But wouldn't; some B is C be a valid conclusion? Sorry if this is kind of...

Homework Statement In the textbook I'm reading it tells me that A \cup \bigcap B = \bigcap \left\{ A \cup X | X \in B \right\} for B not equal to ø Homework Equations The Attempt at a Solution I don't understand how this would work, the left side of the equation creates a set...