1) 1200 J is the amount of energy that a clothes iron transforms per second, asks:
(I) How many CALs are there ?, (II)
How many KWH are

2) One
Low consumption electric lamp has an efficiency of 30% to illuminate.
If the electrical energy used is 4,500 J, determine the value of the
missing energies.

Your physics assignment is to figure out a way to use electricity to launch a small 6.0-cm-long plastic drink stirrer. you decide that you'll charge the little plastic rod by rubbing it with fur, then hold it near a long, charged wire, as shown in figure p23.56 . when you let go, the electric force of the wire on the plastic rod will shoot it away. suppose you can uniformly charge the plastic stirrer to 10 nc and that the linear charge density of the long wire is 1.0 x10-7 c/m. what is the net electric force on the plastic stirrer if the end closest to the wire is 2.0 cm away?