If the copper is drawn into wire whose diameter is 7.50 mm , how many feet of copper can be obtained from the ingot? the density of copper is 8.94 g/cm3. (assume that the wire is a cylinder whose volume is v=πr2h, where r is its radius and h is its height or length.) express your answer using two significant figures.

If a balloon is taken outside on a very cold day, what will occur?

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.