If r is the total resistance of three resistors, connected in parallel, with resistances r1, r2, r3, then 1 r = 1 r1 + 1 r2 + 1 r3 . if the resistances are measured in ohms as r1 = 64 ω, r2 = 20 ω, and r3 = 8 ω, with a possible error of 0.5% in each case, estimate the maximum error in the calculated value of r. (round your answer to three decimal places.)

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.