calculate the length of a piece of copper wire with a diameter of 2 mm and a resistance of 0.5omh. The resistivity value of this copper was measured at room temperature in ohm​

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

How many dots must be added to the symbol to properly represent a standard nitrogen ion? a) 1 b) 3 c) 5 d) 8

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