Acopper wire has a circular cross section with a radius of 1.25 mm. if the wire carries a current of 3.70 a, find the drift speed in mm/s of the electrons in this wire. (note: the density of charge carriers (electrons) in a copper wire is n = 8.46 × 1028 electrons/m3)

Asystematic approach to problem solving is called a (an)

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.

Describe the work performed by a ski lift in terms of kinetic and gravitational potential energy