STI stands for Sexually transmitted infection.
Explanation:
The sun heats the earth through radiation. Since there is no medium (like the gas in our atmosphere) in space, radiation is the primary way that heat travels in space. When the heat reaches the earth it warms the molecules of the atmosphere, and they warm other molecules and so on.
Answer:
True
Explanation:
A car is designed to utilize fuel as its source of energy. This fuel contains chemicals, which the engine of the car breaks down via combustion to facilitate its functioning. Kinetic energy is a form of mechanical energy produced as a result of motion. A moving object, individual etc uses kinetic energy to do so.
The fuel (gasoline) being supplied into the car's engine makes the car able to move, hence, we can say that the chemical energy present in the fuel is being converted to kinetic energy (observable in the car on motion) with the release of heat by the engine.
Answer:
Because of the chemical and structural nature of the phospholipid lipid by layer the lipid soluble molecule can just pass the lipid membrane and some small molecules can also pass freely.
Explanation:
as we know that the homeostasis is an important process for a living cell to maintain it self so for the the exchange of materials between the external and internal environment is must so for that it exchange material with the outside environment of the cell.as the cell membrane is semipermeable(mean allow some molecule to pass(lipid soluble) and not others(lipid non soluble) to pass through the membrane.the cell membrane is selectively permeable due to its nature and chemical composition the chemical composition is lipid and phosphate and glycerol(head) with fatty acid that may b saturated or unsaturated(tail).so finally all those molecule which are polar can not pass through the membrane and non polar can pass the membrane.The size of the molecule is also a factor on which the permeability depends.
