Which notation is commonly used on force diagrams to show forces acting on an object? FD Fz FN Fx

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

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

Give an example in which the electrical energy changes to light energy