Suppose you are holding a flat mirror and standing at the center of a giant clock face built into the floor. Someone standing at 12o’clock shines a beam of light towards you, and you want to use the mirror to reflect the beam toward an observer standing at 5o’clock. What should the angle of incidence be to achieve this?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?