Answer:

Explanation:
given,
mean weight of human = μ = 170 lbs
standard deviation = SD = 50 lbs
N = 400 humans
By using central limit theorem,
P (x< 175)




using z-table

hence, the probability that total weight is less tan 175 lbs is equal to

Newton’s first law, an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Or in our case an object at rest will stay at rest until an outside force interferes.
Answer:
ΔT = 0.29°C
Explanation:
Using the law of conservation of energy:

where,
ΔT = Temperature difference between the water at the top and the bottom of the fall = ?
g = acceleration due to gravity = 9.81 m/s²
h = height of fall = 125 m
C = specific heat capacity of water = 4200 J/kg
Therefore,

<u>ΔT = 0.29°C</u>
Answer:
10
Explanation:
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Answer
given,
mass of the rod = 1.50 Kg
length of rod = 0.85 m
rotational velocity = 5060 rev/min
now calculating the rotational inertia of the system.
where L is the length of road, we will take whole length of rod because mass is at the end of it.
I = 1.084 kg.m²
hence, the rotational inertia the system is equal to I = 1.084 kg.m²