Delay what is the required mass ratio to achieve an exhaust velocity of 2.455 km/s with a specific impulse of 294 seconds? choose one. a. 2.34 b. 2.12 c.3.12 d.5.11 e. 4.33

How do hearths affect cultural diffusion? a. a hearth is the destination of cultural diffusion. b. a hearth divides a cultural region in two. c. a hearth is the beginning point of cultural diffusion. d. a hearth is the means of cultural diffusion. e. a hearth is the meeting point of two diffuse cultures.