Answer:
30.128 days
Explanation:
Given that:
Mean = 25
Standard deviation = 4
Confidence interval = 90% = 0.9
Since the confidence interval should not exceed 90%
Then using z test table
P(z) = 0.9
For 0.8997 , we get = 1.28
For 0.9015, we get = 1.29
∴
By solving
Z = 1.282
Thus, the duration to be used so that it will not exceed 90% C.I is:
Z = (x - μ)/σ
1.282= ( x - 25)/4
1.282 * 4 = x - 25
(1.282*4)+25 = x
x = 30.128 days
Answer:
maybe it's twang because of the blade tension
Answer:
Great question! Are you useing copper frige tubing if so>
Explanation:
if you are makeing a heater for a fire you are on the right path. Just slowly undo the tubbing. It hint here is slow. I have sometimes used a heat gun to slowly get it apart. Just heat it till in is soft enought to get un done. Then you can use it on a fire to heat water or what ever else you had in mind.
Answer:
Required power input = 0.77hp
Explanation:
We need to first of all find the cooling load of the ice machine.
The cooling load is expressed as
=(28 lbm/h) * (169 Btu/lbm)
= 4732 Btu/h.
Therefore, to find the power input of the ice machine, we use:
Wm = Ql / COP
Wm = (4732Btu / 2.2)
Wm = 1971.66 Btu/h
Since we are asked to find power, let's convert to hp.
Therefore
Wm = (1971.66 Btu/m) * (1hp/(2545Btu/m)) = 0.7741hp
The required power input for an ice production rate of 28 lbm/h is 0.77hp
Answer:
provide sun protection to reduce skin damage in sunny weather