The following choices are provided;
- Earthquakes release phosphorus.
- Phosphorus is carried in the rain that was evaporated from lakes.
- Human use of fertilizers releases phosphorus into the groundwater.
- Phosphorus is transpired.
The answer is; Earthquakes release phosphorus
Phosphorus is usually made less available to plants and to the rest of the ecosystem through runoffs. The washed-off phosphorus is deposited at the oceans- and seabeds with sediments. This phosphorus is made available again due to tectonic plate movements. Tectonic movements may cause earthquakes that expose these sediments to the earth’s surface.This uncovers the sedimentary rocks to agents of weathering and hence the elements are more available to living organisms on the surface.
A force of 8 N will be required.
<h3><u>Explanation:</u></h3>
Mechanical advantage is defined as the ratio of output force from a system to the input force into the system. A machine which has the mechanical advantage more than 1 means it requires less force to give more force as output. Similarly, when the mechanical advantage for the machine is less than 1,it means more force is required to give to achieve a less one.
Here in the question, the mechanical advantage of the pulley is 2.
Output force required to pull the sack of potatoes upto kitchen is 16N.
Mechanical advantage = Output force / input force.
Or, 2= 16 / input force.
So input force = 
So a force of 8 N will be required to pull the pulley.
Biotic factors of an ecosystem are all the living organisms that affect other organisms in an ecosystem and include animals, plants, microorganisms, dead organisms, and even animal waste. Example of biotic factors include: Grass as producers (autotrophs).
1. The United States granted independence to Philippines in the year 1946, when the island liberated from the occupation of Japanese during the time of world war 11.
The independence was being established by the Treaty Mania. After Spanish-American war, the United States then acquired by Philippines in the time of 1898.
Before, Philippines it was colonized by Spain and then later by United States.
2. Unlike France, Russia and Britain the United States wanted to keep trade in China open.
3. When Philippines rebelled against United States rule, then the United States found itself using same tactics which were used by Spanish in Cuba.
Filipinos used Guerrilla warfare to undermine United States powers. It is through the military action which United States showed dominance over the Philippines.
The layer inside Earth that creates Earth's magnetosphere is the core.
hope this helps!
