Assume that the home construction industry is perfectly competitive and in long-run competitive equilibrium. it follows that: a. marginal cost exceeds long-run average total cost. b. marginal cost equals long-run average total cost. c. there will be incentive for new firms to enter the industry. d. firms in the industry enjoy economic profits.

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

What is the momentum of a 2 kg object moving at 15 meters per second

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?