Answer: historians believe it was mad for self defense reasons for hunters and soldiers and It can be hard to believe that one punch can kill someone, but the medical effects of a blow to the head can be swift and severe.
Explanation:
Exercise and not to smoke or be around second hand smoke. But exercise is probably the more important thing you can do to protect your respiratory system.
Answer:
The angle of refraction θ₂ = 40.51 degree
Explanation:
given data
ray incident = 60 degree
refractive index of water = 4/3 = 1.333
solution
we will use here Snell's law that states as
n₁ sin θ₁ = n₂ sin θ₂ .....................1
here we take refraction of air n₁ = 1
so put value in equation 1 we get
1 × sin60 = 1.333 × sinθ₂
sinθ₂ = 0.6496
θ₂ = 40.51 degree
Answer:
True.
Explanation:
Artificial selection is also known as selective breeding and it is a process that involves humans (breeders) selecting the animal or plant with desirable traits in order to reproduce favorable offspring having phenotypic traits.
This ultimately implies that, when farmers or breeders select plants having desirable traits for breeding, it avails them the opportunity of changing the appearance or phenotype of a crop over time such as disease resistance, taste, size, etc.
Having something accessible like a heartrate meter. Use your pointer and middle finger and feel on the underside of the side of your chin. Find a beat and that is your pulse, while walking you can count how many times that beats in 30 seconds multiply by 2 and that is your heart rate.
