Consider the null-type wheatstone bridge. suppose r r 3 4 = ï± ï = ï± ï 100 2 , 200 2 , r 2 is variable calibrated resistor, and r 1 = ï± ï 100 1 is the transducer resistance. calculate the means and uncertainty of r 2 that is required to balance the bridge

Fluids at rest possess no flow energy. a)- true b)- false

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise