more than 1 mile
gravitygravity! a+
Gravity keeps a planet in orbit. Inertia tries to make the planet move in a straight line. The balance between the two makes the planet orbit a sun.
Straight. If gravity did not pull a planet into an elliptical orbit, momentum would cause it to continue straight ahead at the same speed it had been moving. If the Sun's gravity were to magically disappear, the Earth would fly off into space at 67,000 miles per hour.
Blue whales communicate by using low frequency whistles, reaching upto 188 decibels, their sound can travel through many kilometres of ocean.
Light always travels in a straight line. It's direction can be changed, by reflection or refraction, but it does not bend.
The diameter of the Earth from North Pole to South Pole is about 12713.6 kilometers. The distance through the Earth from opposite longitudes at the equator is farther due to the rotational "bulge", about 12776.2 kilometers.
Yes, they do. But they sometimes travel a straight line through bent space.
13 900 km , by air travel, straight line, between Bucharest and Melbourne
gravitygravity! a+
Gravity keeps a planet in orbit. Inertia tries to make the planet move in a straight line. The balance between the two makes the planet orbit a sun.
Transparent
Straight line.
travels through a uniform medium
Light waves travel at approx 300,000 kilometres per second, sound at approx 0.343 kilometres/second.Light waves can travel in vacuum or through some media (there is no such word as mediums!). Sound waves cannot travel through vacuum: they needs a physical medium.
Kepler's Law: "The orbits of the planets are ellipses with the Sun at one of the foci."
Yes, think of the radiation from the Sun, it must travel through the vacuum of space to warm our own planet Earth.
Light travels faster than air. Its beam are straight so that it travels through holes.