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Why are transition metal complexes coloured?

By definition, all transition metal ions have d orbitals. These are normally degenerate, lying at the same energy level as there is nothing to break the symmetry.

However, in the presence...

ZT
Answered by Zac T. Chemistry tutor
7660 Views

The tip of each prong of a tuning fork emitting a note of 320Hz vibrates in SHM with an amplitude of 0.50mm. What is the speed of each tip when its displacement is zero?

As with any question that lists numbers, the first thing to do is to note down the known variables:

f = 320 Hz

A = 0.50 mm

x = 0 mm

v = ?

...
ES
Answered by Ellie S. Physics tutor
17289 Views

How does antibiotic resistance develop in bacterial populations?

When a course of antibiotics is taken, non-resistant bacteria should be killed. However, genetic mutations can lead to certain individuals becoming resistant to a particular antibiotic. The mutated gen...

CD
Answered by Callum D. Biology tutor
6736 Views

A cricketer throws a ball vertically upwards so that the ball leaves his hands at a speed of 25 m/s. Calculate the maximum height reached by the ball, the time taken to reach max. height, and the speed of the ball when it is at 50% max. height.

We can see that this is a suvat question, since it involves a projectile. The first step for any suvat question is to list the known suvat variables for the point we're looking at (in this case, the po...

ES
Answered by Ellie S. Physics tutor
21786 Views

How do I use "y" and "en" in sentences?

The concept of "y" and "en" can be difficult to grasp at first, as both words are often used quite idiomatically, and can be translated in a number of different ways. 

CD
Answered by Callum D. French tutor
27582 Views

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