Answer:
Explanation:
a= 7.8i + 6.6j - 7.1k
b= -2.9 i+ 7.4 j+ 3.9k , and
c = 7.6i + 8.8j + 2.2k
r = a - b +c
=7.8i + 6.6j - 7.1k - ( -2.9i + 7.4j+ 3.9k )+ ( 7.6i + 8.8j + 2.2k)
= 7.8i + 6.6j - 7.1k +2.9i - 7.4j- 3.9k )+ 7.6i + 8.8j + 2.2k
= 18.3 i +18.3 j - k
the angle between r and the positive z axis.
cosθ = 18.3 / √18.3² +18.3² +1
the angle between r and the positive z axis.
= 18.3 / 25.75
cos θ= .71
45 degree
Answer:
a)time t = 47.4s
b)speed v = 38.7cm/s
Explanation:
Given:
Total volume of blood = 4.93L × 1000cm^3/L = 4930cm^3
Volumetric rate of flow = 104.1cm^3/s
a) Time taken for all the blood to pass through the aorta is:
Time t = total volume/ volumetric rate
t = 4930/104.1
t = 47.4s
b) Given that the diameter of the aorta is 1.85cm.
V = Av
Where V = Volumetric rate
A = area of aorta
v = speed of blood
v = V/A ...1
Area of a circular aorta = πr^2 = (πd^2)/4
d = 1.85cm
A = (π×1.85^2)/4
A = 2.69cm^2
From equation 1.
v = V/A = 104.1/2.69
v = 38.7 cm/s
Answer:
A person must be "voluntary".
Explanation:
The research project has so far been implementing this very same factual information on either the basis of results for such an induced conformational.
- A report that serves to protect investigators from unintentional reporting of personally identifiable details that were acquired during a research project.
- This could be characterized as constantly looking for new consequences on just about any particular subject based on assumptions, statistics, and conducting an investigation of the explanations.
Answer:
so birds have better tempatures
Explanation:
when a bird gets to cold in ny or somting it migrates over to floridia to become warmer because it does not snow in floridia