Sunday, August 15, 2021

Save electricity while work from home

 Electricity usage at home for sure has increased by far a lot for many people in the past whole year. It has caught my attention recently when my exhaust fan blower sounds louder than it used to be. The blower has never been serviced since when it was first installed ages ago. No one told me i need to do so. It was a good sign than it reminds me of the types of blower fan available in my house. I first Google and look for guide on how to service the blower. No much guide available for the exactly same model to mine. 

It leaves me no choice but to explore it all by myself. Servicing the blower fan blade seems to be an easy task that not many people talked about or at least in my cycle of friends. The whole process took less than half an hour. 

The same goes with the exhaust fan in my bathroom. Never thought that it will be so dirty. The same goes with the air-conditioner indoor unit ! There are mould growth all over the interior surface. Clean with soap and then disinfect using hand sanitizer with at least 60% alcohol content. 

All blowers now blowing at maximum speed at pin drop silent. The wind is so strong now!

It certainly helps save electricity for long period of operation. Dusty gathered for sure increase the payload of the electricity motor. Less weight for sure will need less electrical energy to provide a spinning motion to the blower. Help this sharing helps you too. 






Monday, August 9, 2021

Using mid-point concept solving a quadratic equation.

 In this method, it make use of the sum of root and product of root to find the x value when the y is zero. 

Quadratic equations has a symmetry at mid-point between the roots. 

The difference before and after the middle point has to be the same!

A standard equation of x^2 - (R1+R2)x + (R1)(R2)= 0  has to be used to obtain the root by the end.


Then the sum of root = R1+ R2 = -b/a

Also, the product of root = (R1)(R2) = c/a 


Following ax^2 + bx + c = 0, getting the root by solving the unknown by first getting the midpoint. 

Hope this help simplify.