In matematic E is denotes the sign to replace number 10 in the metrik prefix.Power of ten meaning that all the long number like 12030345050505050 can be write as 1.2 x 10^16 or 1.2+E17 mm.second,hr, and other basic units.Now days there are have a special name for the power ten.Starting from 10^18 called for exa ,10^15 for peta,10^12 for tera,10^9 for giga,10^6 for mega,10^3 for kilo,10^2 for hecto,10^1 for deka,10^-1 for deci,10^-2 for centi,10^-3.milli,10^-6 for micro,10^-9 for nano,10^-12 for pico,10^-15 for femto and 10^-18 for atto.
in electrical E is denotes the quantity of electrical energy transfers and can be calculated by E=charge x potential difference or E=QV where Q =quantity of electric charge in coloumbs(C) and V are the potential difference.E units are in Joules(J) and also the basic unit for SI for energy beside m for length,kg for mass,second for time and 4 other basic unit in SI.
The E sign in civil engineering are denote Young modulus.Young modulus or elasticity modulus for material such as steel.wood,concrete,rubber and etc.The formula for E is stress/strain.The tensile stress will make material start deform.The E is important to know at what force for certain size of material will deform at what length.This is very important for designing all the structure like concrete,steel and timber especially the deformation value at the live load.The highest E is the diamond and the zero E is a liquid.
The E sign or symbol at the themometer in our car is not empty but enough.When the needle touch the E line,the pump patrol image machine will light on and blinks so many times to inform the driver to top up or refill the fuel.How if the patrol station far away or no patrol station at the route?.Don t panic,according to the experts,the E denote enough and have a reserve oil about 4.5 litre and can go about 50 km or more if shut down the aircon.The author have and experience when the oil pump image blinks so many time a after that not blink and the nearest pump station are 20 km away and along the road is a jungle with less of kampung house.Shut down the aircon and start drive at constant speed but the mind set not stable and dangerous and cant focus for driving.Lucky the car still live when reach at the patrol pump.So hope this information useful for all.
And the E is popular when doing a survey because the reading at the staf are base on the E shape or pattern and also popular for eye testing to determine whether our eyes short blind or long blind.All the E shape from the big to the small are shown for a certain distance to test can see or not very clear all the shape same when to get a L licence,all the student must past the eyes test before proceed for second stage.
From the above E shape or E formula is important alphabet and useful in our life.Thank you
No comments:
Post a Comment