An electric rice cooker rated 800 W, 230 V is switched on for 30 minutes. a) How much electrical energy is used by the rice cooker?
b) Calculate the cost of energy that is used by the rice cooker if the cost per kWh is 30 sen.​

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match