Module 5, 5B, Exercise 3, page 61.0:03
Speaker A. My project will measure the heat that comes from a compost heap.0:10
When organic waste decomposes, it gets warm.0:18
Mostly it's due to the bacteria.0:22
We'll see how much energy comes from this process.0:24
I've been writing some code.0:36
It's a simple program that will control a small robot connected to the USB port.0:37
You type in commands for going forward, back, and from side to side.0:43
Did you know you can use cabbage juice to find out if something is acidic?0:55
Well, you will see it done in my project.1:00
The juice changes colour when it comes into contact with different substances.1:03
I will use it to test common household liquids.1:08
Speaker: D. I was amazed to find out that a cardboard toilet roll can be strong enough to stand on.1:15
If you fill it with sand.1:23
But do the same with small stones, and it can be a different story.1:25
This principle demonstrates how structures like bridges and skyscrapers are built.1:30
Speaker: E. My experiment must be the most dramatic.1:39
It's called a Gauss gun.1:46
It's not actually a gun, but a row of small metal balls and a magnet.1:49
A small tap on one end sends the ball at the other, shooting off at very high speed.1:54
It shows the power of magnets and momentum.2:01
Клик по слову — перевод и «+ в мои слова» (в любом режиме). Клик по строке или таймкоду — перейти к этому месту записи.