Sorry I don't know just need comments to get points, desperate need of help with maths home work xx
The one with the the limestone thingy is faster because the friction is loss
my educational guess
The same principle apply to stereo microscopes, a 10X eye piece combined with a 4X objective lens will produce 40X magnification.
This is why it’s important to protect echo systems: Ecosystems are essential to our well-being and prosperity as they provide us with food, clean air and fresh water. Ecosystems also represent an exceptional source of outdoor recreation opportunities. The functions performed by ecosystems that increase our well-being are called ecosystem services.
