Friction helps stop a bike when you use the brakes, but it can be harmful by slowing your speed down, if you hit the brakes hard at the sudden moment, you could possibly tumble and or fall. It also causes heat, so if not used correctly, that can be an injury. If you were to fall from the sudden stop, you could possibly hit the ground which can cause a knee injury and or scrapes.
        
                    
             
        
        
        
Answer:
Algae is a non flowering plant and found in very most and wet areas. 
The Importance of algae include mopping up of the Carbon dioxide present in waterbodies and producing some amount of oxygen to the water through photosynthesis and this helps in the survival of sea animals.
It also helps in pollution control and degradation of hard toxic substances.
They also serve as source of food of sea animals.
 
        
             
        
        
        
Answer:
I'll create more, but this is the limit (took a while, so brainlist plwease)
ヾ(^∇^)
Explanation:
Gasoline is a mixture of liquid organic materials. You already know about one of these materials—ethanol. Most gasoline in the United States is about 10% ethanol. The other materials in gasoline are mostly hydrocarbons: organic molecules made of only hydrogen and carbon. Because ethanol has oxygen atoms it is not a hydrocarbon.
One hydrocarbon molecule in gasoline is octane: C8H18. Here is the structure of an octane molecule. All of the different hydrocarbon molecules in gasoline have about the same amount of energy. However, octane is different from some of the other organic molecules in gasoline because octane burns very smoothly.
At a gas pump, people can choose from types of gasoline
with different octane ratings. All of the different grades have the same amount of energy, but high-octane gasoline burns more smoothly. The octane ratings on a gas pump indicate how smoothly the gasoline burns: an octane rating of 100 means that the gasoline burns as smoothly as pure octane.
(High-grade gasoline is more expensive. Most cars do not need gasoline that burns so smoothly, so for most cars it makes sense to get the less expensive lower-octane gasoline that has just as much energy.)
How does an engine get energy
 
        
             
        
        
        
When grilling chicken using charcoal fire, the energy transformation that takes place starts from chemical energy, to radiant energy and then thermal energy. The combustion reaction of the charcoal fire converts the chemical energy into heat. The charcoal fire is considered as radiant energy. Lastly, burning fuels like coal or wood produces thermal energy, and that thermal energy is basically the reason why the chicken was cooked even without directly touching the fire.
 
        
                    
             
        
        
        
Answer:
 Pedigrees are used to analyze the pattern of inheritance of a particular trait throughout a family.