4 In the circuit of figure 1, the cell E1 has an emf of 15V and internal resistance of 2; the cell E2 has emf of 6V and internal resistance of 3; and the cell E3 has emf of 4V

and internal resistance of 1. In the circuit R1=4, R2=3 and R3=2

Determine the currents I1, I2, and I3 [5 marks]

Figure 1

Asystematic approach to problem solving is called a (an)

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

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.