8. The Innocence Project found that most faulty convictions were based on a) out-of-date investigating equipment
b) poor DNA sampling
c) inaccurate eyewitness accounts
d) officers not thoroughly observing a crime scene

When an object is heated it contracts. a. true b. false

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.