How can you improve life in a country?

What happens IF the wires from a battery charger are put the wrong way round onto battery terminals and left to charge? What circumstances can alter the reading of PVC? What is meant by left skewed binary tree? How many psi is six sack cement? You have load 200Amp long 200meter how calculate voltage drop and what size cable can used? How do you change 3 phase to single phase for Henny Penny display warmer? For a half-wave rectifier there is current through the load for approximately what per- centage of the input cycle? What benefits do pulley simple machines have to man? What are the advantages and disadvantages of hydro-electric power stations on hills? What is load pressure? Why is it necessary to bevel an edge before welding it? Can you do amplification without transistor and is it possible to design oscillator using diode? A 30 Ohm resistor is connected to a 4-V supply How many watts will this resistor have to dissipate? What is SERVQUAL and when was it first invented? What do you hope to achieve with your education? What does reuse or repurpose mean? What is the difference between half subtractor and full subtractor? Can one intentionally short ct to one side of transformer? What is the effect of silicon in carbon steel? Why is the pan handle made of plastic?