Afigure skater begins spinning counterclock-
wise at an angular speed of 3.6 7 rad/s. dur-
ing a 5.0 s interval, she slowly pulls her arms
inward and finally spins at 8.5 7 rad/s.
what is her average angular acceleration
during this time interval?
answer in units of rad/s.

Which of the following describes something an engineer would probably do first when developing new technology meant to reduce ocean pollution? o a. evaluate the benefits and challenges of using certain chemicals to purify water. o b. research new scientific findings in regard to ocean cleanup. o c. identify the need to reduce ocean pollution. o d. research what has been done in the past to clean up oceanic oil residue.

Ways that industry and agriculture use physical properties to separate substances

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?