A glass rod is rubbed with a piece of silk to give it a positive charge. The rod is then brought near to an uncharged metal sphere supported by an insulated stand. The rod is then removed. What type of charging is used to charge the rod

Suppose that a comet that was seen in 563 a.d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

The speed of light can be used to measure the