plzz answerrr Write down each of the following in standard form to 2 significant figures. (i) 5 690 000

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

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

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