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.
Answer:1. A unit of mass equal to the mass of 1 cubic centimeter of water at 4° C.
2. Prefix meaning one-hundredth (.01).
3. A measure equal to one-hundredth of a meter.
4. A measure equal to one thousand grams.
5. Unit of measure equal to one-tenth of a meter.
6. The basic measure of volume in the metric system.
7. A system of numeration that is based on units of ten.
8. Prefix meaning one thousand (1,000).
9. A measure equal to one thousand meters.
10. An amount of surface.
Explanation:
Answer:
Diffusion
Explanation:
The process by which substances move from areas of higher concentration to areas of lower concentration is called diffusion.
For example:
Substance moves across a cell membrane without using the cell's energy tends to move away from the area where it is more concentrated.
It is known as passive transport.
It is the process in which substance without using the cellular energy tend to move down the concentration gradient.
It is also known as simple diffusion.
When perfume bottle is open particles spread in air due to difference in concentration from bottle to out side environment.
While,
In case of active transport substance move against the concentration gradient i.e to wards the area of higher concentration.
This process require energy.
The organism's cells are constrained by their varying shapes and sizes. Due to the need for surface area to exchange gases, the size distribution of the cell has been limited. Thus, option a is correct.
<h3>What is a cell?</h3>
The smallest unit of an organization that is essential for life is known as a cell. The different cells' varying sizes and shapes enable them to carry out various functions and activities.
The size distribution of the cell has been influenced by the cell's requirement for a cell surface area and volume in order for the exchange of gases to actually happen.
Therefore, option a. the cell size is influenced by surface area and gas exchange.
Learn more about cell size, here:
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