Two charged particles each with a net charge of -q are a distance r apart. the electric force f is measured. the distance between the particles then doubles to 2r, and the amount of charge on both charges doubles to -2q. relative to the original force, what is the new electric force?

Adelivery truck leaves a warehouse and travels 2.60 km north. the truck makes a left turn and travels 1.25 km west before making another right turn to travel 1.40 km north to arrive at its destination. what is the magnitude and direction of the truck's displacement from the warehouse?

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.