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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.

In this class we will discuss unusual job positions, companies and articles

Listening all parts of FCE test

In Spanish, there may be several ways to ask the same question. Note the inverted question mark that begins each question.

Class in GLOW marathone 2 about Machu Picchu

We will discuss the topic of friendship and revise could and should, future

-things in my classroom -review of letters A, B, C, D

In this class we will discuss the 21 day challenge and future constractions will and to be going to.

столовые приборы: spoon, jug, glass...