Recent content by wizzkids

LASER stands for Light Amplification by Stimulated Emission of Radiation. LASER devices are monochromatic by nature because the light amplification effect only occurs at one particular photon energy and one particular photon wavelength. The photons that are emitted are coherent and monochromatic.

I think you are right. However, this is a weird question. To construct an electrochemical cell you would normally construct it from two half-cells. Each half-cell would contain a metal electrode in equilibrium with a solution of its own ions. The two half-cells would be connected by a...

There are 70 ways to select 4 members from a set of 8. However not all of these are proper words. I can find 19 words that are proper words in the English language (not counting repeats like "labs"): slay subs Susy Yass lass lays labs ally ably bays ball bass buys bull busy slab slay Saul says

To create an animated GIF you need to design each frame of the animation. For smooth motion you could be looking at designing 50 frames. Whatever GIF animation software you choose, you still need to create the images before you can assemble them into the finished filmstrip, so you need to find...

According to Quantum Mechanics, the ball can be considered to be at the top of its path as well as everywhere else at the same time. There is only a higher probability of finding the ball at the top of its path at any given moment. You need to calculate the Wave Function of the Ball to work out...

It seems like a perfectly good question. There are eight elements in the third period. They each have very different electronegativities, some are electron donors (Na, Mg, Al) and some are electron acceptors (P, S, Cl). Si is an interesting case to discuss. Then there is Ar which doesn't form...

Here is a website that I like: Java Chemistry Lab It's coded in JSmol and it lets you drag and drop atoms to make covalently bonded molecules and ionically bonded lattice. Another good one is run by Dr Karl Harrison, and it also uses the JSMol library: https://3dchem.com

If you have some time, go watch this video by Drs Hume and Ivey, It's all about relative velocity. Pretty cheesy, but absolutely 100% relevant to solving your problem. Frames of Reference (1960)

Too hard to call. Ask one of the students in Year 12 what they did last year, and it's bound to be something similar.

Oooh yeah, how about a depth study on Hunga Tonga-Hunga Ha'apai (Tonga) eruption, January 2022? (for Module 6)

Hydroxide ions don't react with un-dissociated propionic acid molecules (that's the molecule on the left). Hydroxide ions react with the hydrogen ions on the right. If you decrease the concentration of hydrogen ions it favours the forward reaction. Do you get it now?

This discussion lies totally outside high school syllabus. There are two ways that Iron(II) hydroxide can dissolve. Iron(II) hydroxide has a region of solid stability between pH 8 and pH12. The stability of the various hydroxides of iron can be conveniently shown on the Pourbaix Diagram. I have...

I think you mean "ionising power" . Alpha particles carry 2 units of positive charge. They travel in dead straight lines about 3 cm in air before they are all stopped by collisions with air molecules. Alpha particles have lots of momentum. Beta particles are very light, they carry one unit of...

The short answer is: practically Zero solubility. Iron(II) hydroxide is almost insoluble in water, it's solubility constant is 4.1 x 10-15. It only starts to become sparingly soluble once the pH starts to get up around 12. Here is how you do these calculations. You can't just halve the...

STRIVE Physics 12 by Odlum & Garner is still available. Go to https://www.odlumgarner.com.au or you can order through any educational bookseller.