What is the resistance of a 1000 m long copper wire with a 1 × 10-6 m² (1 mm²) cross-section assuming copper's resistivity is 1.68 × 10-8  ω·m? answer in the form: ##.#

True or false a high force means an object is moving fast100 points!

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.