On average, both arms and hands together account for 13 % of a person's mass, while the head is 7.0 % and the trunk and legs account for 80 % . We can model a spinning skater with her arms outstretched as a vertical cylinder (head, trunk, and legs) with two solid uniform rods (arms and hands) extended horizontally. Suppose a 70.0 kg skater is 1.50 m tall, has arms that are each 66.0 cm long (including the hands), and a trunk that can be modeled as being 33.0 cm in diameter. If the skater is initially spinning at 69.0 rpm with her arms outstretched, what will her angular velocity Ď 2 be (in rpm ) after she pulls in her arms and they are at her sides parallel to her trunk? Assume that friction between the skater and the ice is negligble.
Answers: 1
Physics, 22.06.2019 04:30
In a system, when potential energy decreases, then entropy also decreases. true false
Answers: 2
Physics, 22.06.2019 05:00
Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesnât, as machines are inefficient. d) no, it doesnât, as machines cannot create energy.
Answers: 1
Physics, 22.06.2019 12:30
Write a full page that sumerizes thermodynamics itâs from the website visionlearnig
Answers: 1
Physics, 22.06.2019 19:30
Another word for electromagnetic energy is a. heat b. force c. matter d. radiation
Answers: 1
On average, both arms and hands together account for 13 % of a person's mass, while the head is 7.0...
Mathematics, 30.07.2019 05:30
Business, 30.07.2019 05:30
Computers and Technology, 30.07.2019 05:30
Mathematics, 30.07.2019 05:30
Chemistry, 30.07.2019 05:30