Answer:
![\left[\begin{array}{ccc}10&0&0\\14&25&0\\57&18&39\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D10%260%260%5C%5C14%2625%260%5C%5C57%2618%2639%5Cend%7Barray%7D%5Cright%5D)
Explanation:
A lower triangular matrix is one whose elements above the main diagonal are zero meanwhile all the main diagonals elements and below are nonzero elements. This is one of the two existing types of triangular matrixes. Attached you will find a image referring more about triangular matrixes.
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Answer:
Optimal aspect ratio = 1
Explanation:
From Chvorinov's Rule,
![T = c [\frac{volume}{surface are}]^n](https://tex.z-dn.net/?f=%20T%20%3D%20c%20%5B%5Cfrac%7Bvolume%7D%7Bsurface%20are%7D%5D%5En%20)
Where
T = solidification time
c = mold constant
For the riser to have the longest solidification time:
We have: D = h
![A = pi Dh[\frac{2pi D^2}{4}] = 1.5D^2 pi](https://tex.z-dn.net/?f=%20A%20%3D%20pi%20Dh%5B%5Cfrac%7B2pi%20D%5E2%7D%7B4%7D%5D%20%3D%201.5D%5E2%20pi)
Therefore,
To have to longest solidification time, D = h
Therefore the best aspect ratio would be,
Answer:
Input power = 465.63 W
current = 1.94 A
Explanation:
we have the following data to answer this question
V = 9130
i = 0.051
the input power = VI
I = 51.0 mA = 0.051
= 9130 * 0.051
= 465.63 watts
the current = 465.63/240
= 1.94A
therefore the input power is 465.63 wwatts
while the current is 1.94A
the input power is the same thing as the output power.
Answer:
Ancestor are our great grandparents
Answer:
2102.1 m
Explanation:
Temperature at the equator = 0⁰
Radius of the earth = 6.37x10⁶
Required:
We how to find out what the clearance between tape and ground would be if temperature increases to 30 degrees.
Final temperature = ∆T = 303-273 = 30
S = 11x10^-6
The clearance R = Ro*S*∆T
=6.37x10⁶x 11x10^-6x30
= 2102.1m
Or 2.102 kilometers
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