subject
Physics, 14.09.2019 11:20 trob1902

Atall tower of circular cross section is reinforced by horizontal circular disks (like large coins, albeit infinitely thin coins). each disk is one meter a part from its neighbors. the radius of the disk at a height n is 1/n(in n) for n > 2. (a) will the total area of the disks be finite or not? hint: can you compare the series with a simpler one? (b) if the disks are strengthened by wires going around their circumference like tires, will the total length of the wire required be finite or not? (c) explain why there is not a contradiction between your answers to parts (a) and (b) - that is, how is it possible to start with a set of disks of finite area, remove a little strip around the circumference of each and get an infinite total length of these strips? hint: think about units - you can't compare area and length. consider two cases: (1) make the width of each strip equal to one percent of the radius of each disk from which you cut it. now the total length is infinite, but what about the total area? (2) try to make the strips all the same width - then what happens?

ansver
Answers: 3

Other questions on the subject: Physics

image
Physics, 22.06.2019 01:30, markmeinberg
Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz
Answers: 3
image
Physics, 22.06.2019 04:30, 2005AngelMoore
Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm
Answers: 2
image
Physics, 22.06.2019 08:00, chuchi24
What is the rate of change in a objects position?
Answers: 1
image
Physics, 22.06.2019 16:00, LikeIke2859
In which of the following is positive work done by a person on a suitcase
Answers: 1
You know the right answer?
Atall tower of circular cross section is reinforced by horizontal circular disks (like large coins,...

Questions in other subjects:

Konu
SAT, 30.11.2020 18:40
Konu
Computers and Technology, 30.11.2020 18:40
Konu
Mathematics, 30.11.2020 18:40
Konu
Advanced Placement (AP), 30.11.2020 18:40