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ehidna [41]
4 years ago
10

Analyze the harmful effects of certain substances and environmental hazards such as environmental tobacco smoke on fetuses infan

ts and young children
Health
1 answer:
marusya05 [52]4 years ago
3 0
<span>premature-birth,
- malformations and low birth weight
-Sudden infant -dead
-The acute respiratory infections, chronic bronchitis and inflammation or ear infections
-asthma
-Of cardiovascular damage
-Development of dependence on nicotine in
<span>children</span></span>
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Rabbit's position vector (r) in the unit vector is 203.5î - 57j and the magnitude and directional angle of vector (r) are 195.35m and 0.004° respectively.

Given

x = 0.3t² + 7.2t + 28

y = 0.22t² - 9.1t +30

At t = 15s

x = 0.3(15)² + 7.2(15) +28 = 203.5

y = 0.22(15)² - 9.1(15) + 30 = -57

The rabbit's position vector (r) in unit vector notation is:

r = 203.5î - 57j

The magnitude of position vector (r)

r = √x² + y²

r = √(203.5)² - (57)² =√38163.25

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The directional angle of position vector (r)

tanθ = y/x = -57/203.5

θ = tan^{-1} (-57/203.5)

θ = 0.004°

Hence, rabbit's position vector (r) in the unit vector is 203.5î - 57j and the magnitude and directional angle of vector (r) are 195.35m and 0.004° respectively.

Learn more about Position vector here brainly.com/question/23922381

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