On a straight road (taken to be in the + x direction) you drive for an hour at 40 km per hour, then quickly speed up to 110 km per hour and drive for an additional two hours. how far do you go ( delta x)? total distance = km what is your average x component of velocity (v avg, x) v avg, x = km/hr why isn't v avg, x equal to the arithmetic average of your initial and final values of v x, (40 + 110)/2 = 75 km per hour? the velocity isn't constant. the arithmetic mean is not a valid way to calculate the average in this situation. the initial velocity isn't zero.
Answers: 3
Physics, 22.06.2019 16:50, justkevin1231
Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.
Answers: 3
Physics, 22.06.2019 20:30, laylay2380
Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm
Answers: 3
On a straight road (taken to be in the + x direction) you drive for an hour at 40 km per hour, then...
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