Forţa electromagnetică cu care interacţionează doi conductori
rectilinii, paraleli pe lungimea I,
parcurși de curenţi electrici: *
nu depinde de sensul curenților prin
conductori;
este invers proporțională cu
O lungimea pe care conductorii sunt
paraleli;
nu depinde de mediul în care se află
conductorii;
O
este invers proporțională cu
distanța dintre conductori;

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?

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.