When Kayla stands on her trampoline, it sags by 0.24 m. Now she starts bouncing. How much time elapses between the instant when she first lands on the trampoline's surface and when she passes the same point on the way up?

Ahypothetical metal has an orthorhombic unit cell for which the a, b, and c lattice parameters are 0.413 nm, 0.665 nm, and 0.876 nm, respectively. (a) if there are 8 atoms per unit cell and the atomic packing factor is 0.536, determine the atomic radius (in nm). (b) if the density is 3.99 g/cm3, calculate the metal's atomic weight (in g/mol).