A ball is thrown upward from the ground with an initial speed of 25m/s. At the same instant, another ball is
dropped from a hot air balloon that is rising a 5 m/s
and is 15m high. After how long with the balls be at the
same height? At what height do the paths of the balls.
cross? Does the first ball ever cross paths with the
balloon? If so, when and where?

How will each of the following changes in demand and/or supply affect equilibrium price and equilibrium quantity in a competitive market; that is, do price and quantity increase or decrease, or are the answers indeterminate because they depend on the magnitudes of the shifts?

Aprojectile is launched horizontally 10m above the ground and with an initial velocity of 15 m/s. a) sketch the trajectory using an appropriate coordination system. b) how long for the projectile to reach the ground. c) how far did projectile travel horizontally before striking the ground. d) determine the projectilex & y position at t-1.3s e) determine the magnitude and direction of projectile velocity at t= 1.3s f) determine the magnitude and direction of projectile acceleration at t-1.3s

What is the earliest point in the universe that we can observe? why can’t we see back further than this?