VI. Compune forțele concurente: F1 = 12 N, F2 = 7 N și F3 = 5 N, ale căror direcții sunt reprezentate în figura următoare (α = 300
).

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?