I have to identify energy transfers and transformations involving the conversion of energy in household items. I've tried, and this is what i've managed.

Cordless Drill:
240v AC electrical energy from ring main --> 14.4v DC (in transformer (and rectifier?)) stored in battery --> mechanical energy (via the motor effect in the motor producing torque)

Downlight:
240V AC electrical energy from the lighting circuit --> 12V AC (in the transformer) --> heat energy from resistance in the filament --> kinetic energy of electrons and atoms in filament --> light energy in the form of black body radiation

Refrigerator:
240V AC Electrical energy from the ring main --> mechanical energy (compressor in the motor) --> thermal energy

The problem is, i don't think the cordless drill or the refrigerator are in enough depth, and i don't even know if the downlight one is right, i was just guessing. And i don't know enough about how the drill or fridge work to go more in depth.

HELP!!!!

I have to identify energy transfers and transformations involving the conversion of energy in household items. I've tried, and this is what i've managed.

Cordless Drill:
240v AC electrical energy from ring main --> 14.4v DC (in transformer (and rectifier?)) stored in battery --> mechanical energy (via the motor effect in the motor producing torque)

Downlight:
240V AC electrical energy from the lighting circuit --> 12V AC (in the transformer) --> heat energy from resistance in the filament --> kinetic energy of electrons and atoms in filament --> light energy in the form of black body radiation

Refrigerator:
240V AC Electrical energy from the ring main --> mechanical energy (compressor in the motor) --> thermal energy

The problem is, i don't think the cordless drill or the refrigerator are in enough depth, and i don't even know if the downlight one is right, i was just guessing. And i don't know enough about how the drill or fridge work to go more in depth.

HELP!!!!

I have to identify energy transfers and transformations involving the conversion of energy in household items. I've tried, and this is what i've managed.

Cordless Drill:
240v AC electrical energy from ring main --> 14.4v DC (in transformer (and rectifier?)) stored in battery --> mechanical energy (via the motor effect in the motor producing torque)

Downlight:
240V AC electrical energy from the lighting circuit --> 12V AC (in the transformer) --> heat energy from resistance in the filament --> kinetic energy of electrons and atoms in filament --> light energy in the form of black body radiation

Refrigerator:
240V AC Electrical energy from the ring main --> mechanical energy (compressor in the motor) --> thermal energy

The problem is, i don't think the cordless drill or the refrigerator are in enough depth, and i don't even know if the downlight one is right, i was just guessing. And i don't know enough about how the drill or fridge work to go more in depth.

HELP!!!!

I need something that will be pretty strong and reliable, but i wont use it too much, so i dont need drills from companies like DeWalt and Black and Decker...
Is this an OK drill?:http://cgi.ebay.com/Maxsuma-HI-TORQUE-18V-Volt-Cordless-DRILL-DRIVER_W0QQitemZ200268031003QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item200268031003&_trksid=p3286.c0.m14&_trkparms=72%3A1199|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A0|293%3A1|294%3A50
Thanks for the fast replies. I dont care if it is cordless or not because i actually want a drill with a cord(i feel it will be more reliable, energy wise). Please if there is a cheap reliable drill, please post a link. thank you so much.

keyless chuck is broken on my 18v dc 759 model. i see i can buy online for 38 bucks or so but i tried taking it off with the screw inside the chuck w/o any luck. i see there s a retainer ring perhaps i can see between the drill body and the torque settings.

do i have to take that out also to separate or just pry the crap outa the old chuck to get it off. i sure hate breaking a 220 dollar drill if im doing this wrong.

thanx in advance.

Years ago I bought a Craftsman Professional corded 1/2" chuck drill. It was almost like a cordless drill with a cord instead of with batteries. What I mean is that there was a High and Low speed switch on the top of it. When I needed to drive lag screws into a post, that sucker did it with ease. It was really wonderful. I don't remember if the tool got lost or broken.

I can't find a drill that features this anywhere today. Does anybody have any ideas? Craftsman does not appear to carry that drill any more, as if it was a limited edition or something. I just can't believe that the High/Low speed switch (not a variable speed trigger, but a switch that changes the torque abaility) isn't found on any drill that is more than 6 amps. That feature is so amazing.

Im looking for a cordless drill (possibley corded; i dont like the batteries running dry) and I was wondering which brands are best and which are worst. The best Iv heard of are Craftsman, DeWalt, and Makita. My dad has had a cordless, corded, and impact makita drill for almost 30 years. This is what im considering most.
Something with a lot of torque, so if i want to drive something besides screws and piolet holes, I can.
But also something relatively cheap.
Can I have some feedback please? ie, experience, opinions, feedback, etc
Thanks
Thanks everyone. For some reason yahoo wont give me the option to choose a best answer but I appreciate all of your input. @fishlakeguy I check, yeah its a hammer drill haha.
I think im going with either makita or dewalt. Goin to the store tomorrow. Thanks again

I making a cordless drill and I need to figure out what battery to use that will power a High Torque Mini 12V 600 rpm DC Gear Motor, and fit within in these dimensions 25mm diameter and 90mm in length. I also need the battery to be rechargeable and be fit to use for a battery amateur like me so no batteries that will explode in my face if I over charge them. Cheers!