Top answers

Use band theory to explain the changes in the resistance of an intrinsic semiconductor as temper changes.

At low temperatures(0K), the conduction band is empty while the valence band if filled. As temperature increases, the electrons gain energy to go into the conduction band and leave positive holes in the vale...
KG
Answered by Kutlwano G. • Physics tutor
16365 Views

Why do ionisation energies typically increase upon going across a period yet decrease upon going down a group?

‘Ionisation energy’ is the term used to describe the amount of energy it takes to remove an electron from an atom to form a positively charged ion. It is usually represented by the unit kJ/mol, meaning it de...
LM
Answered by Lewis M. • Chemistry tutor
3171 Views

How am I to approach an unseen poem?

*** Firstly, you need to read the poem to discover its subject matter (for example, a love poem). Whilst doing this, it’s also important to consider the perspective of the speaker in the poem in regards to t...
TB
4794 Views

Find all solutions of x^2-x-6 using the quadratic formula

From the given quadratic, we have a=1, b=-1, and c=-6. We substitute these values into the quadratic formula, x=-b+-sqrt(b^2-4ac)/2a, giving us x=-1+-sqrt(-1^2-4 1 -6)/2*1. This simplifies to x=1+-5/2. Keepi...
JH
Answered by Jack H. • Maths tutor
4425 Views

How can I introduce myself?

For me, my name is Hayley then it will be わたしはヘイリイです。ヘイリイis Hayley in Katakana (used for english phase in japanese).わたしis I am, ですis an ending after a noun/adjective for a japanese present form sentences.
HL
2275 Views