Which cell is responsible for synthesizing proteins?

Which atomic model was proposed as a result of j. j. thomson’s work?

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.

Is a copper wire a conductor or insulator?