What is meant by laws of motion?

What is meant by laws of motion? 1 : a statement in dynamics: a body at rest remains at rest and a body in motion remains in uniform motion in a straight line unless acted upon by an external force. — called also Newton’s first law of motion. What is the three laws of motion? […]

Which type of power plant is best?

Which type of power plant is best? Hydroelectric power plants. Hydroelectric power plants are one of the most effective and eco-friendliest of all power plants. Nuclear power plants. Nuclear power stations also top the list of power plants that can produce massive amounts of energy. Coal-run power plants. Where was the first power plant? Pearl […]

What happens to a dead star?

What happens to a dead star? Stars die because they exhaust their nuclear fuel. Once there is no fuel left, the star collapses and the outer layers explode as a ‘supernova’. What’s left over after a supernova explosion is a ‘neutron star’ – the collapsed core of the star – or, if there’s sufficient mass, […]

How does a streams gradient affect its velocity?

How does a streams gradient affect its velocity? Gradient is usually expressed in feet per mile of meters per kilometer. Gradient looks at how far the water drops over the distance the water actually flows. The gradient influences the velocity of the stream. The steeper the gradient, the higher will be the velocity if all […]

Why do black bodies radiate?

Why do black bodies radiate? A black body is an idealized object that absorbs all electromagnetic radiation it comes in contact with. It then emits thermal radiation in a continuous spectrum according to its temperature. Much cooler objects like planets and humans emit the most radiation in the infrared. Can radiation travel through a vacuum? […]

Is it dark during solar eclipse?

Is it dark during solar eclipse? In a solar eclipse, the Moon moves between the Earth and the Sun. When this happens, part of the Sun’s light is blocked. The sky slowly gets dark as the Moon moves in front of the Sun. What is the longest solar eclipse ever? The longest possible duration of […]

What was the source of power in the Middle Ages?

What was the source of power in the Middle Ages? Even as agriculture emerged, followed by towns and cities, human muscles — and those of domesticated animals — were still the main source of power. How has energy consumption changed over the past 50 years? Over the last 50 years, while energy consumption grew substantially, […]

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