Does liquid evaporate with adding heat or losing it

An engineering team designs a new rocket that is faster and lighter than any other model being produced. however, the materials end up being so expensive that no company can afford to buy them. which step of the engineering process should have addressed this problem? a. know the background. b. evaluate the results. c. identify a need. d. do the work.

Which statement describes james chadwick’s discovery.

Which compound contain an iron with a 3+ charge