QUES: A commutator is a mechanism used to switch the input of most DC machines and certain AC machines consisting of slip ring segments insulated from each other and from the electric motor's shaft. The motor's armature current is supplied through the stationary brushes in contact with the revolving commutator, which causes required current reversal and applies power to the machine in an optimal manner as the rotor rotates from pole to pole. In absence of such current reversal, the motor would brake to a stop. In light of significant advances in the past few decades due to improved technologies in electronic controller, sensorless control, induction motor, and permanent magnet motor fields, electromechanically commutated motors are increasingly being displaced by externally commutated induction and permanent-magnet motors.
What two motor types are descendant today?

ANS: unanswerable

QUES: Teeth (singular tooth) are small whitish structures found in the jaws (or mouths) of many vertebrates that are used to tear, scrape, milk and chew food. Teeth are not made of bone, but rather of tissues of varying density and hardness, such as enamel, dentine and cementum. Human teeth have a blood and nerve supply which enables proprioception. This is the ability of sensation when chewing, for example if we were to bite into something too hard for our teeth, such as a chipped plate mixed in food, our teeth send a message to our brain and we realise that it cannot be chewed, so we stop trying.
What happens when you bite something you cant chew?

ANS: our teeth send a message to our brain and we realise that it cannot be chewed, so we stop trying.

QUES: The performance of "Summertime" by Barrino, later known simply as "Fantasia", at Top 8 was widely praised, and Simon Cowell considered it as his favorite Idol moment in the nine seasons he was on the show. Fantasia and Diana DeGarmo were the last two finalists, and Fantasia was crowned as the winner. Fantasia released as her coronation single "I Believe", a song co-written by season one finalist Tamyra Gray, and DeGarmo released "Dreams". Fantasia went on to gain some successes as a recording artist, while Hudson, who placed seventh, became the only Idol contestant so far to win both an Academy Award and a Grammy.
Who was the runner up on the third season of American Idol?

ANS: Diana DeGarmo

QUES: The style of Georgian buildings is very variable, but marked by a taste for symmetry and proportion based on the classical architecture of Greece and Rome, as revived in Renaissance architecture. Ornament is also normally in the classical tradition, but typically rather restrained, and sometimes almost completely absent on the exterior. The period brought the vocabulary of classical architecture to smaller and more modest buildings than had been the case before, replacing English vernacular architecture (or becoming the new vernacular style) for almost all new middle-class homes and public buildings by the end of the period.
And what type of architecture is ornament normally not restrained?

ANS:
unanswerable