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.

Asuppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer.

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?