A 4,000 kilogram truck travels in a straight line at 10.0m/sec. What it's momentum?

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

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?

Where do magnetic lines of force enter earth?