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Another important property of a wave is the speed of propagation. This is how fast the disturbance of the wave is moving. The speed of mechanical waves depends on the medium that the wave is traveling through. For example, sound will travel at a different speed in water than in air. The velocity of a wave is usually represented by the letter "v."
Apr 6, 2022 · Science terms are easy to understand when you remove big scientific words from their definitions. Become a junior scientist by exploring key science terms.
- Michele Meleen
- Staff Editor
In science, however, motion is defined as the change of the position of an object with time. Motion is a key characteristic of all matter. Even things we cannot see, such as the particles that make up matter, are capable of motion. The scientific study of motion forms the basis of mechanics, a branch of physics.
Describing Motion. An object in motion can be described by its speed and its velocity. The speed of a moving object is a measure of how fast it is moving. Speed is equal to the distance the object travels divided by the time it takes to travel that distance. For example, a car that travels 30 miles in one hour has a speed of 30 miles per hour.
- The World of Wonder
- Which Is Heavier, A Ton of Feathers Or A Ton of Coal?
- Why Is The Sky Blue?
- Why Do Ships and Ice Float?
- Can We Travel to The Centre of The Earth?
- Why Can Birds Sit on Power Lines and Not Get A Shock?
- Why Are Things Different Colors?
- What Is sound?
- Can We Hear in Space?
- How Do We Talk to Astronauts in Space?
Why is the sky blue? What is air made of? How many stars are there? World of wonder fun science facts that every child should know! This article covers space, nature, technology, engineering, elementary math, chemistry, physics and biology. Science is fascinating and tries to explain how everything in the world and outer space works. Science gives ...
This is a trick question and lots of people get caught out. Of course they both have the same weight! However coal is denser than feathers which means a lot of weight is packed into a smaller space or volume.Feathers are less dense than coal but take up lots more space for the same weight.
Visible light from the Sun is made up of different colours, in fact all the colours of the rainbow. These colors have different wavelengths. Blue is one of these colours and has a short wavelength. The atmosphere is made up of different gasses we call air, composed of tiny particles called molecules. It also has lots of tiny water droplets floating...
The Principle of Archimedes explains why ice floats. This says that the force or push upwards on an object equals the weight of displacedwater. Displaced means pushed out of the way. Since ice is less dense than water, the weight of a piece of submerged ice would be less than the weight of water it displaces. So the force upwards is greater than th...
Most of the inside of the Earth is made of really hot melted rock. This part is called the mantle. At the centre of the Earth is the core which is made of solid iron. It would be really difficult to travel to the Earth's centre because it is so far away and all the material would have to be pushed out of the way as we travel. The distance to the ce...
Electricity flows around in a loop. When a bird lands on a power line, electricity can't flow through its body. However if it touched an adjacent line with a lower voltage, electricity would flow from one line through its body to the other line and it could be electrocuted.
White light is made up of lots of colors. In fact, all the colors of the rainbow: red, orange, yellow, green, blue, indigo and violet. When white light falls on an object some of it is reflected just like the way a ball bounces off a wall. Other colors in the light are absorbed or taken in by the object and not let back out. So a red object for ins...
Sound is a vibration of air molecules. When you hit something, it shakes or vibrates really quickly. This shakes the air all around it. The air next to this air also shakes and the shaking continues just like a string of people in a line passing on a message to each other. Sound propagates or travels through the air and eventually we hear it. Sound...
No, we can't because there is no air in space. We call this a vacuum.Without air, vibrations produced by an object or when we speak can't be transmitted through space.
We can't use sound because it doesn't travel through the vacuum of space and in any case, it wouldn't go far enough. We have to use radio communication. Our voice is turned into electricity by a microphone and then into radio waves or electromagnetic radiation.These waves travel really fast, in fact a signal would go around our planet Earth seven t...
Jul 18, 2022 · 4. An object in motion becomes at rest, or stops the movement. (For example, when you catch a ball that is in motion). Movement: Position, Trajectory, Distance and Displacement. Movement is the change of position of a body in a given time. To understand movement it is necessary to fix a reference point. Cartesian coordinate system facts for kids
Weathering is a natural process that slowly breaks apart or changes rock . Heat , water , wind , living things , and other natural forces cause weathering.
