Why is the sky blue? The earth is surrounded by an atmosphere. ... How much does the earth weigh? ... How far away is the sun? ... What is a black hole? ... How do airplanes fly? ... How do flies walk on the ceiling? ... How are rainbows made? ... Are sharks mammals?
Answers
Answer:
Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
Answer:
Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
5.972 × 10^24 kg
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Distance from Sun: 149.6 million km
Surface area: 510.1 million km²
black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
Airplanes fly because they are able to generate a force called Lift which normally moves the airplane upward. Lift is generated by the forward motion of the airplane through the air. This motion is produced by the Thrust of the engine(s).
Close-up of the tacky hairs and claws on a fly foot taken with an Electron microscope. Each fly foot has two fat footpads that give the insect plenty of surface area with which to cling. ... The adhesive pads on the feet, called pulvilli, come equipped with tiny hairs that have spatula-like tips.
A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.
Sharks are not mammals. Rather, they are a species of fish. Sharks have a skeleton that is entirely composed of cartilage and is equipped with leathery, tough and scale less skin. These skeletons differ greatly from those of the bony fish.
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