Clean dry and wet mops monthly. O True O False
2 answers:
You might be interested in
Answer:
0.2 m/s
Explanation:
The velocity of a point on the edge of a disk rotating disk can be calculated as:
Where is the angular velocity and r the radius of the disk. This leads to:
Answer:
0.0371 kg/s.m
Explanation:
From the given information, let's have an imaginative view of the semi-cylinder; (The image is shown below)
Assuming the base surface of both ends of the cylinder is denoted by:
Thus, using the summation rule, the view factor and
is as follows:
Let assume the surface (1) is flat, the
Now:
However, using the reciprocity rule to determine the view factor from the dome-shaped cylinder to the flat base surface
; we have:
Suppose, we replace DL for and
=
Then:
Now, we need to employ the use of energy balance formula to the dryer.
i.e.
But, before that; let's find the radian heat exchange occurring among the dome and the flat base surface:
where;
∴
Recall the energy balance formula;
where;
here;
= enthalpy of vaporization
m = the water mass flow rate
∴
