Answer:
The convection coefficient is 
Solution:
Mass flow rate, 
Inner diameter of the tube, d = 0.014 m
Fluid density, 
Specific Heat, C = 3845 J/K
Thermal Conductivity, K = 0.74
Prandtl Number, 
Heat flux, 
Viscosity, 
Now,
To calculate the convection heat coefficient, h:
Determine the cross sectional area of the circular tube:
Determine the velocity of the fluid inside the tube by mass flow rate:
v = 2.624 m/s
Determine the Reynold's Number, 
:
Thus it is clear that > 10,000 hence flow is turbulent.
Now,
Determine the Nusselt Number:
Also,
where
h = convection coefficient
Now,
Answer:
the ball's velocity was approximately 0.66 m/s
Explanation:
Recall that we can study the motion of the baseball rolling off the table in vertical component and horizontal component separately.
Since the velocity at which the ball was rolling is entirely in the horizontal direction, it doesn't affect the vertical motion that can therefore be studied as a free fall, where only the constant acceleration of gravity is affecting the vertical movement.
Then, considering that the ball, as it falls covers a vertical distance of 0.7 meters to the ground, we can set the equation of motion for this, and estimate the time the ball was in the air:
0.7 = (1/2) g t^2
solve for t:
t^2 = 1.4 / g
t = 0.3779 sec
which we can round to about 0.38 seconds
No we use this time in the horizontal motion, which is only determined by the ball's initial velocity (vi) as it takes off:
horizontal distance covered = vi * t
0.25 = vi * (0.38)
solve for vi:
vi = 0.25/0.38 m/s
vi = 0.65798 m/s
Then the ball's velocity was approximately 0.66 m/s
Answer:
35.3 N
Explanation:
U = 0, V = 0.61 m/s, s = 0.39 m
Let a be the acceleration.
Use third equation of motion
V^2 = u^2 + 2 as
0.61 × 0.61 = 0 + 2 × a × 0.39
a = 0.477 m/s^2
Force = mass × acceleration
F = 74 × 0.477 = 35.3 N
Answer:
Magnesium atomic no. = 24,25,26. These are the two elements which have same atomic no
Explanation:
Answer:
a} <u>Infrared radiant heaters.</u>
<u>b} Fan heaters.</u>
Explanation:
I hope this is okay, should I give more.
