1.) A stone falls from rest from the top of a cliff. A second stone is thrown downward from the
same height 2.2 s later with an initial speed of
43.12 m/s. They hit the ground at the same
time.
How long does it take the first stone to hit
the ground? The acceleration of gravity is
9.8 m/s^2.
Answer in units of s.

Answer for the first question is 3.3s. I just need the second one.

2.) How high is the cliff?
Answer in units of m

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

Apatient has a history of poor nutrition. he has skin rashes, bleeding gums, and a cut that hasn’t healed in a long time. what vitamin deficiency most likely caused this symptom?

Why do astronauts in the space shuttle weigh less?