Consider a simple monitoring application where we use two nodes n1 and n2. Each node when sensing temperature that is higher than 40
oC raises an alarm (by turning
its red light on for 30msec), and at the same time sends an alert message to the
other node which turns its green light on for 20 msec. Each node takes a sample of
temperature every 10 minute.
We need to implement this monitoring system in nesC. Write the required module,
header and Makefile files. Show the final overall wiring diagram.

What precautions should you take to prevent injuries when dealing with heavy loads?

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

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