B. Answer the following questions. a. What is force? What can a force do?
b. Define rest and motion.
c. What is work in science? Define work done aga
d. What is energy? Write any three forms of ener
e. What is heat energy?
f. What is light energy?
g.
Define kinetic energy and potential energy.
h. You are pushing wall but it does not move. Ha
thermal ene
work? Why?
i. How can energy be saved?

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation