A10 g bullet moving directly upward at 1000 m/s strikes and passes through the center of mass of a 5.00 kg block initially at rest. the bullet emerges from the block moving directly upward at 400 m/s. (a) to what maximum height does the block then rise above its initial position?
(b) what is the average force that the bullet exerts on the block if it takes the bullet 1.40 × 10^−4 s to travel through the block?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.

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).

Metals are good conductors of electricity because they