Which answer best explains microgravity. Gravity in space, or microgravity, is a tiny fraction of what it is on Earth. Astronauts are able to float because they are out far enough from the Earth to escape gravity. Because gravity diminishes by the inverse square of the distance if you get away from the earth microgravity takes over. Things orbiting Earth appear weightless but are actually falling around the Earth.

The right answer is a. The air above a wildfire.

Three methods allow the applicabe thermal transfer to heat the water.

CONDUCTION HEATING:

* The principle of conduction is probably the simplest heating system to understand.

* This process is based on a heat transfer by the contact between two media of different temperature.

* One hot element will warm another element when they come into contact.

* For example, when you walk on a heated floor, the heat of the floor is directly transmitted to your feet.

CONVECTION HEATING:

* A convector uses the movement and circulation of molecules to transmit heat.

* Radiators that operate through the convection process suck the air and then heat it with an electric heater.

* This air is then blown into the room to warm the surrounding air.

RADIANT HEATING:

* Radiation is a process that transmits heat by waves.

* Indeed, waves are emitted naturally by all objects.

* The hottest elements transmit their heat to the colder elements by these waves. We talk about radiation.

* A radiator that uses this principle generally heats a plate that will transmit heat into the ambient air through the radiation process.