Two students are arguing about light. Jenny says, “A ray of red light that enters a piece of transparent glass will slow down in the glass.” Tammi replies, “No, the light will not slow down but the color of the light will change.” Which student do you most agree with? Explain your thinking?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?

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.