Suppose that you live in a strange universe with a dimensionless Hubble constant h=0.45. Suddenly, you are sent close to a supermassive black hole at the center of
an unknown galaxy, observed in your (strange) universe to be at redshift z=0.06. You
then come back, quite likely much younger than your fellows on planet Earth. How far
did you travel, in light years ?

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.