Two satellites are in circular orbits around the earth. The orbit for * 29. A jet flying at 123 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, and the mass of the jet is 2.00 105 kg. Calculate the magnitude of the necessary lifting force. ** 30. The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r 11.0 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.760, and the angle in the drawing is 36.0. How much time is required for your suitcase to go around once? satellite A is at a height of 360 km above the earths surface, while that for satellite B is at a height of 720 km. Find the orbital speed for each satellite. 32

BiogeographyinaChangingWorld GEOG2 Lecture8:Dispersal ProfessorD.Cusack dcusack@geog.ucla.edu Office:1113Bunche 1 Chapter8:MainPoints • Ecologicalvs.biogeographicaldispersal • Modesofdispersal(anemo-hydro-zoo-andanthro-chores) • Colonizationvs.Migrationsvs.Irruptions • Logisticgrowthincolonization – Whatishappeningateachpartofthecurve • Diffusionvs.Jump • Barriers,corridors,filters,steppingstonesandsweepstakes • Whatisasupertramp …andbywater ActiveDispersal • Propagulesuppliesself-motion • Mostanimals AnimalDispersed(Zoochores) WindDispersal(Anemochores) • Dispersalsporesandseeds • Manyplants,fe