Answer:
In hp:
Part B:
In hp:
Explanation:
Weight of elevator=1000-lb
Force=500 lb
s=15 ft
Force on pulley=F=3*500=1500 lb
g=
According to Newton's Second law:
According to attachment:
According to third equation of motion:
Where:
Vo is initial velocity
V is final velocity
S is final distance
So is starting distance
Output power:
In hp:
Part B:
When S=35 ft
Output power:
In hp:
Answer:
The ratio of heat transfer rate is 0.88
Explanation:
Given;
Case1 :
height of vertical surface, L = 1 m
width of vertical surface, w = 0.6 m
Case 2:
height of vertical surface, L = 0.6 m
width of vertical surface, w = 1 m
At an assumed film temperature of air = 300 K
then, read off from heat transfer table, temperature inverse β, surface area flow rate v, and Pr, to determine Rayleigh number for the two cases.
β = 1/300 = 0.00333 K⁻¹
v = 15.89 x 10⁻⁶ m²/s
Pr = 0.69
Case 1, L = 1 m
Case 2, L = 0.6 m
From the values of Rayleigh numbers above, case 1 is Turbulent flow while case 2 is laminar flow
Thus: C₁ = 0.1, n₁ = ¹/₃
C₂ = 0.59, n₂ = 1/4
Ratio of heat transfer rate is given as:
Therefore, the ratio of heat transfer rate is 0.88
Answer:
11.125°
Explanation:
Given:
Radius of bend, R = 100 m
Speed around the bend = 50 Km/hr = = 13.89 m/s
Now,
We have the relation
where,
θ = angle of banking
g is the acceleration due to gravity
on substituting the respective values, we get
or
or
θ = 11.125°