71 percent of the Earth's surface is covered with water. The visible bodies of water are referred to as surface water and water found underground as soil moisture and in aquifers is referred to as groundwater. <span>Humans use both ground and surface water.</span>
20% of the world's freshwater supply comes from groundwater and 80 % from surface water.
Answer:
4in
Explanation:
Given parameters:
Radius of cylinder = 6in
Volume = 144πin³
Unknown:
Height of the cylinder = ?
Solution:
The volume of a cylinder is the product of its base area and height;
Volume of cylinder = base area x height
The unknown parameter is the height and substitute for the parameters given;
144π = π x 6² x h
144π = 36πh
Divide through by 36π and find h;
h = 4in
Answer:
I believe the answer is C. Spectroscope
Explanation:
"To study the atmospheres of other planets and their moons, earthbound astronomers use a set of techniques called spectroscopy. Light is collected by a telescope and split into its component wavelengths, creating a spectrum."
HIPWAC - NASAhttps://ssed.gsfc.nasa.gov › hipwac › howitworks
Distance between objects in the solar system is usually measured in astronomical units.
Answer:
The direction of rivers are usually expressed with respect to the directions we are familiar with: North, South, East or West.
A river has an origin, usually at a higher latitude and ends at the sea or ocean or a large water body. Gravity is the driving force for river flow. Hence, we gauge the ‘direction’ the water is going to flow for any river.
If we were going to get more technical, flow in rivers and streams are measured for their streamflow, which is the amount of water passing through some infinitesmal volume, i.e a point over time. The velocity of the water is determined using acoustic/Doppler based instruments, which will give the local direction of the flow of the river at the measured point along with the velocity.
Hope the answer helps!