Adisk rotates freely on a vertical axis with an angular velocity of 30 rpm. an identical disk rotates above it in the same direction about the same axis, but without touching the lower disk, at 20 rpm. the upper disk then drops onto the lower disk. after a short time, because of friction, they rotate together. the final angular velocity of the disks is
a. 50 rpm
b. 40 rpm
c. 25 rpm
d. 20 rpm
e. 10 rpm
Answers: 1
Physics, 22.06.2019 02:00
In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong
Answers: 1
Physics, 22.06.2019 05:20
Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.
Answers: 2
Physics, 22.06.2019 07:40
An object's buoyant force and weight mean the same thing.a. trueb. false
Answers: 2
Physics, 22.06.2019 11:30
Which of these questions might a character ask if the conflict is man versus self? a. which path should i take to better myself? b. which boulder will be too heavy for me to carry? c. which friend is going to ditch me today? d. all of the above
Answers: 1
Adisk rotates freely on a vertical axis with an angular velocity of 30 rpm. an identical disk rotate...