Write a 500-750 word description of an item or a piece of equipment used in your field (for example, a GPS device, bluetooth technology, etc). In a note preceding the description, specify your audience and indicate the description (general or particular) you are writing. If you use sources, be sure to cite them correctly.

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

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false