Top answers

What speed do satellites orbit at?

The key point to recognise here is that an object undergoing a circular orbit around the Earth is undergoing circular motion. Circular motion is caused by a centripetal force (acting towards the centre of th...
RM
Answered by Ryan M. • Physics tutor
4497 Views

Why does ionisation energy of elements generally decrease as you move down a group in the periodic table?

Ionisation energy is the energy required to remove the most loosely bound (furthest out) electron from an atom, in the gaseous state. As you move down a group in the periodic table, the number of protons in ...
SB
Answered by Sam B. • Chemistry tutor
7353 Views

How many different types of sentence logic relationships (sytactic relations) are there in Mandarin?

As a frequently tested point in A level papers , the logic relationships of sentences and the according conjunctions are very important in reading Chinese articles. Unlike English language, modern Chinese is...
XW
Answered by Xing W. • Mandarin tutor
5037 Views

How do you form the future indicative tense with regular verbs?

The future indicative tense is used to describe actions that will happen in the future. It is formed with regular verbs through taking the infinitive form of -er , -ir , and -re verbs and adding the appropri...
RC
Answered by Rob C. • French tutor
4349 Views

Explain, in terms of the behaviour of molecules, how a gas exerts a pressure on the walls of its container. (4)

This question is 4 marks so you need to make at least 4 points. These types of questions just require memorising the 4 points: Lots of molecules collide with the walls. The molecules change momentum as they ...
JF
Answered by Jake F. • Physics tutor
25128 Views