Top answers

Describe the forces acting on an object on earth falling through the air, and how they change from when the object is first released into the air leading to terminal velocity.

The two forces acting on the object are weight due to gravity pulling the object towards earth, and drag resisting this motion. When the object is first released, drag is small as velocity is low, so the res...
JE
Answered by Julia E. • Physics tutor
33988 Views

What is a catalyst, and how does it affect the rate of reaction?

A catalyst is a substance which provides an alternative pathway requiring a lower activation energy for the chemicals to react, and speeds up the rate of reaction. A catalyst also remains chemically unchange...
JE
Answered by Julia E. • Chemistry tutor
3036 Views

Please explain the difference between compound and simple interest

First of all, let's start by defining the word 'interest'. Interest in mathematical terms generally means an amount of money that is accumulated over a period of time after an amount of money is invested or ...
HM
Answered by Henry M. • Maths tutor
5033 Views

Como se estructura una carta?

Para escribir una carta es importante tener la estructura correcta; esto incluye: Dirección - Del remitente y el destinatario por encima del texto, a ambos lados de la pagina. Nombre y apellido del remitente...
LS
Answered by Luca S. • Spanish tutor
4973 Views

Explain why a firm in Perfect Competition earns supernormal profits in the short-run

A perfectly competitive market is a market where a large number of firms produce identical products (perfect substitutes). The characteristics that define perfect competition are the following: - no barriers...
NV
Answered by Nora V. • Economics tutor
21917 Views