Man Driving Two Bumper Cars on The Street In China

Distance and displacement

Distance and displacement are different. When you traveled 50 km to the East and then 20 km to the West, the total distance you traveled is 70 km, but your displacement is 30 km East.

In physics, we say that distance is a scalar and displacement is a vector. Scalar has a magnitude and vector has both a magnitude and a direction. Scalar is one dimensional and vector is two dimensional.
A car moved 100km to the East. What is its displacement? Can you answer?

motion

How do objects move? How far can a rubber band stretch? How does energy affect what we can see, hear or feel? Discover the science of motion and energy.

structure of flowers

The female parts of a flower consist of an ovary, which contains one or more ovules, a style and the stigma. The ovary is at the base of the flower.
From the ovary, extends a tubular structure called the style and on the top of the style is a surface receptive to pollen called the stigma.

The stigma can take many different forms, most of them designed to help trap pollen. There are many variations on this basic structural theme.

After fertilization the ovule becomes the seed and the ovary becomes the fruit.

The male parts of a flower consist of one or more stamens. Each stamen is made up of paired anthers (sacs containing pollen) on a filament or stalk.

The anthers are the orange/yellow structures often seen in the centre of a flower.

Pollen from the anthers of one flower is transferred to the stigma of another usually either by wind, or by animals, especially insects.

Introduction

Hi ! everyone
There is knowledge in this blog for student M.1 and chemistry about rate reaction , acid-base.
                          Thank you for your attention.
                                 Kru Wandee

Introduction

Hi! everyone