please answer these questions
1. which is greater- speed of the light on the speed of the sound?
2. about three fourth of the earth surface is covered with water. why then is there a shortage of water??
3. where does water exist in gaseous state?
4. we depend on light energy for food and fuel. explain
5. why does a solar eclipse always occur on a new moon day?
Whoever will answer the correct answer I will give him / her britanist
Answers
Answer:
1.Light doesn't need a medium to travel. The speed of sound through air is about 340 meters per second. It's faster through water, and it's even faster through steel. Light will travel through a vacuum at 300 million meters per second.
Answer:
1.Light doesn't need a medium to travel. The speed of sound through air is about 340 meter /second. It faster through water, and it's even faster through steel.
2.About 71 percent of the Earth surface is covered with water and the ocean hold about 96.5percent. water was existing in air.
3.Water also exist in the air as water vapour, in rivers and lakes, in ice-caps and glaciers in the ground as soil moisture.
4.Plants used light energy from the sun to make their food...... The food made by plants in further eaten by Animals. The plants and animals living millions of years ago used sunlight and which when died ended up as fossil fuels.
5. Eclipse do not happen at even new moon of course.This is because of moon's orbit is tilted just over 5degree relative to Earth's orbit around the sun.For the reason the moon's shadow usually passes either above or below the Earth, so a solar eclipse doesn't occur.
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