You develop a sensor with a thermoelectric cooled CCD detector (-20C). You get a sensitivity of 15000 counts/molarity and a method detection limit 0.1 mM (millimolar). Assuming all the noise is Dark Noise (slide 55), what would be the sensitivity and detection limit if the detector were only cooled to 10C

friction

explanation:

they us to move forward and backwards

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.