Audio exercises / Lessons

What is torque? This is one of those things that you may have heard about in passing but never really understood. In this episode of Crash Course Physics, Shini sits down with us to discuss what torque is, how it works, why it works, and what it all has to do with this thing called "Moment of Inertia."

Continuing with last week's introduction of calculus, Shini leads us through the ways that integrals can help us figure out things like distance when we have several other key bits of information. Say, for instance, you wanted to know how far your window was off the ground. By using integrals, a tennis ball, and a stop watch, you can figure that out! It's all here in this episode of Crash Course Physics!

In this lesson we are going to talk about countries, nationalities and languages.

Conditional sentences (+ mixed) : theory, speaking tasks, exersices, board game.

In this class we will discuss the grammar topic - Present Perfect (have you ever...).

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

Get ready for your trip to Spain with this class- pluses, minuses, food and rules

-stand up, sit down, clap, point, jump, put hand up/down -letters C and D -new words: cat, coat, dog, date

Explore the lytic and lysogenic viral replication cycles with the Amoeba Sisters! This video also discusses virus structures and why a host is critical for viral reproduction. Expand details for table of contents and further reading suggestions! This updated video replaces our older virus video