1. Why is the sky blue??
2. How much does the earth weight??
3. How far alway is the sun??
4. What is a black hole??
5. How do aeroplanes fly??
6. How do flies walk on the ceiling??
7. How are rainbows made??
Answers
Answer:
1.Its blue because of the scattering of the blue light coming in the form of UV rays from sun..
2.Its 5.972×10²⁴
3.About 10M kilometer / 5M miles
4.A black hole is a space-time region that exhibits very strong gravitational acceleration. No matter how strong gravity is, no particle, ultimately anything, including electromagnetic radiation like light, can escape from its gravity
5.By the mechanism of cutting air and flying
6.As they have small suction pores on their hand / feer
7.Its also made by the scattering of light
When a raindrop falls then , when sunlight enters the water droplets the white light disperses into 7 diff colours and thus during rainfall the colour is produced constantly and we see a RAINBOW!!!!
Answer:
1. 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.
2. 5.972 × 10²⁴kg
3. 148.94 million km
4. A 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.
5. Airplane wings are shaped to make air move faster over the top of the wing. When air moves faster, the pressure of the air decreases. So the pressure on the top of the wing is less than the pressure on the bottom of the wing. The difference in pressure creates a force on the wing that lifts the wing up into the air.
6. Flies need sticky feet to walk on ceilings, but not so sticky that they get stuck upside down. So each foot comes with a pair of claws that help hoist the gooey foot off the wall. Flies use several different techniques to get unstuck: pushing, twisting, and peeling its footpads free.
7. A rainbow is caused by sunlight and atmospheric conditions. Light enters a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths--or colors. When light exits the droplet, it makes a rainbow.
Hope, it helps..