Apropeller is modeled as five identical uniform rods extending radially from its axis. the length and mass of each rod are 0.777 m and 2.67 kg, respectively. when the propellor rotates at 573 rpm (revolutions per minute), what is its rotational kinetic energy?

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.