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Friction: Crash Course Physics #6
  • Physics

Friction: Crash Course Physics #6

Why is it hard to move a heavy bookcase across a carpeted floor? And why is it easier to keep it moving than it was to get it started moving? You might think it's all about weight, but actually it's about friction. Two kinds of friction! In today's episode of Crash Course Physics, Shini Somara tells us about Static and Kinetic friction; how they work and how they're different.

  • Video
  • Beginner
  • English
Andrei Scherbak
Andrei S.
0
33
futuro
  • Spanish

futuro

-futuro simple -futuro perfecto

  • Theory with exercises
  • Intermediate
  • English
Polina Evstafjeva
Polina E.
0
33
SER AND ESTAR:
  • Spanish

SER AND ESTAR:

Whole books have been written about the two important Spanish verbs: ser and estar. This will be the subject of our discussion for the next few lessons. Soon, you will have a very good understanding of how these two verbs are used.

  • Theory
  • Elementary
  • English
Eugeniia Klimutina
Eugeniia K.
0
33
Motivation
  • English

Motivation

In this class we will talk about motivation at work and life.

  • Theory with exercises
  • Upper Intermediate
  • English
Maria  Nekrasova
Maria .
0
33
Morning routine
  • English

Morning routine

Your student will learn to: discuss similarities in the morning routines of highly productive people; apply the vocabulary related to productive routine; use present tenses more confidently; create and discuss the lists to become more productive.

  • Theory with exercises
  • Upper Intermediate
  • English
Darina Gribanova
Darina G.