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How do you calculate the Earth's escape velocity?

The escape velocity is the speed that an object must have in order to have enough energy to escape the Earth's gravitational field. To calculate the escape velocity, we can apply the principle of Conservatio...
AE
Answered by Aldwyn E. • Physics tutor
26203 Views

How do I write an effective introduction for an English essay?

Planning The key to writing a good essay introduction is to plan your answer first. This is more difficult in an exam than for a coursework essay, as you have the additional pressure of limited time. As a ge...
SP
37504 Views

What are the differences/similarities between perfect competition and monopolistic competition?

Economists can predict and describe the nature of a firm based upon its existing size, structure, behaviour and relationship to other firms (market power). This is known as theory of the firm . Two possible ...
OJ
Answered by Olivia J. • Economics tutor
87152 Views

What is standard deviation and how does it work for non-grouped data?

Standard deviation is the spread of data around the mean value. It is useful for evaluating the spread of a selection of data, and is used to compare multiple data sets. Ideally a data set would have a low s...
SW
Answered by Savannah W. • Maths tutor
5023 Views

Why can't you hear any noise in space?

To understand this, we must first know how sound energy gets from one place to another. This is done via waves, of which there are two different types: longitudinal and transverse. Light is a transverse wave...
JT
Answered by James T. • Physics tutor
4330 Views