Physics, 20.01.2022 05:30 xandraeden32
(100 points!)
A star of radius R1 rotates every 20 days. The star suddenly collapses to a radius R2, which is smaller by a factor of 10000 (R2=R1/10000) without losing mass.
a. What is the new angular velocity of the star? You may assume that the moment of inertia of the star is that of a solid sphere (I=(2/5)mR^2)?
b. What is the ratio of the kinetic energy before and after the collapse (KEf/KEi)?
Answers: 1
Another question on Physics
Physics, 22.06.2019 18:50
An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
Answers: 2
Physics, 22.06.2019 20:10
On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?
Answers: 1
Physics, 22.06.2019 21:10
A10-kg isto a of 10 m at aa0.9 kg/m.30 kg of ,at aas10-m .. ( 9.8 m/s2 g.)
Answers: 3
Physics, 22.06.2019 23:30
Forms of meditation hail from which traditions a ) eastern traditions b ) western traditions c ) eastern and western traditions d ) neither eastern nor western traditions
Answers: 1
You know the right answer?
(100 points!)
A star of radius R1 rotates every 20 days. The star suddenly collapses to a radius R...
Questions
Mathematics, 16.02.2021 23:00
Mathematics, 16.02.2021 23:10
Mathematics, 16.02.2021 23:10
Mathematics, 16.02.2021 23:10
Medicine, 16.02.2021 23:10
Mathematics, 16.02.2021 23:10
Biology, 16.02.2021 23:10
Mathematics, 16.02.2021 23:10
English, 16.02.2021 23:10
Computers and Technology, 16.02.2021 23:10
English, 16.02.2021 23:10
