4 km in 30 min then 8 km in 60min or an hr. so 8km/hr.
2 size dependent = volume and mass. 2 size independent properties = conductivity, bowing point, state of matter, and melting point. analyze, name two size dependent properties and two size independent properties of an iron nail.
hope this helps
Answer:
Explanation:
First of all, we need to calculate the resistance of the piece of copper wire between the bird's feet, which is given by
where:
is the resistivity of copper
is the length of the piece of wire between the bird's feet
is the cross-sectional area of the wire, with r being the radius. Since the radius is half the diameter:
the area is
And the resistance is
And given the current in the wire, I=32 A, we can calculate the potential difference across the bird's body by using Ohm's law:
I'm not sure he was the 'first', but the modern "law" of that situation is now known as "<em>Archimedes</em>' Principle".
Archie himself was a Greek mathematician, physicist, engineer, inventor, and astronomer who lived from 288 to 212 BCE.
