John walks four kilometers east, two kilometers north as shown in the diagram below. What is John’s displacement 4 km

11 km

2 km north

7 km east

True or false: the revolution of the earth creates day and night as it rotates around the sun

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?

This is the substance(s) formed in a chemical reaction.