13) Use the following command entries to draw a 2D AUTOCAD object:
20.-20; 30,20:0.10, 30,00,30; -140,0;0,50: 50,0:0,60:10, 0, 0,-100; 10,0,0,100; 30,0:0:-100: 10.0.0.100: 100-
0.-30: 10.0; 0,30; 30.0: 0,30; -40,0;0.-50; 50.0:0.10: -40.0:0.3040,0,0,70; -130.0:0.-70; -50.0-0.-100-200
20,-20; 30,20 press Center?

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

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.