The theory of evolution explains that species change in small ways through a gradual process of natural selection that occurs over the course of many generations. these small changes can eventually lead to entirely new species. if a scientist discovered a sequence of dna that links the manatee (a marine mammal) to their land-dwelling ancestors, which explains the likely effect of this discovery on the theory of evolution?

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

Select all the correct answers. which three statements about electromagnetic radiation are true?