Precipitation.
Rain or if it freezes, hail.
Water molecules naturally adhere to other water molecules. As water vapor condenses in the air, the molecules collect into droplets until they are heavy enough to begin falling. Depending on the various weather conditions, these droplets can connect to other droplets before they reach the ground, thereby forming larger and larger drops, or they could evaporate before they reach the ground, returning to the gaseous state in the air.
A mass of tiny drops of water in the sky is called a cloud. These clouds become heavy and then create rain.
As soon as the droplets become too heavy for wind currents to keep them in the cloud, they fall under gravity.
You can use the heavy machinery such as rigs to get the coal out of the ground
precipitation
Rain or if it freezes, hail.
For example, clouds are made up of drops of liquid in the air: humidity. When the drops of water in the air are not heavy enough to fall back to the ground, they form into groups and appear as clouds in the sky.
For example, clouds are made up of drops of liquid in the air: humidity. When the drops of water in the air are not heavy enough to fall back to the ground, they form into groups and appear as clouds in the sky.
they drop. Gravity!
Raindrops
how do droplets become heavy enogh so that the droplets fall as rain and snow
Water molecules naturally adhere to other water molecules. As water vapor condenses in the air, the molecules collect into droplets until they are heavy enough to begin falling. Depending on the various weather conditions, these droplets can connect to other droplets before they reach the ground, thereby forming larger and larger drops, or they could evaporate before they reach the ground, returning to the gaseous state in the air.
It simply isn't heavy enough. For a star to become a black hole it has to be heavy enough that it's mass is compressed into a sphere with a smaller radius than a certain value, called the Schwarschild radius. Our sun, (Sol) doesn't possess enough matter.
Precipitation occurs when a front collides with moist air particles. It raises those particles into the air and condenses them into clouds if those clouds become big enough and the water droplets become heavy enough they come down as rain if the air is warm enough for rain. If the air drops to 34 degrees and below then it could become snow or freezing rain. The air temperature is what determines what type of precipitation occurs.
rain
the load might be a bit heavy so the back wheels are not on the ground enough to turn?