Evaluate the use of hydrogen as a fuel. explain how hydrogen is produced. write about the environmental impact of using diesel and petrol.

(pls include info on how to make a poster bc that's my work, )

Answer (d) valerie rides her bike south at 8 kilometers per hour///owen jogs south at 8 kilometers per hour ;

//(b) both involve the use of levers;

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.