The recommended unit loads (pressures) for the main bearing of a Diesel engine are higher than those of a comparable power gasoline engine. The reason may be: a. Diesel engines have higher compression ratios than petrol engines b. Diesel fuel viscosity is higher than gasoline fuel viscosity None of the above d. Diesel fuel has high Octane Number than Gasoline fuel Diesel engines run at higher RPM than Gasoline engines

2. What is the mechanical advantage of a claw foot hammer having a handle with a length of 45 cm and head length of 10 cm?

ANSWER problem 2.149& 2.150.Use x(0)=.1m and x(dot)(0)=2 as a template for answering the problem stated problem. And note theta tells you which quadrant the tan inverse value will fall in so for example theta with two positive values so the angle inputted will be in quadrant 1 (in the unit circle).Negative value from tan inverse means subtract the inverse tan value from larger value and positive value means add to the smaller value. EX: quad 2 (in the unit circle) smaller value is 90 and larger value is 180

I need a clear answer by hand, not by keyboard  and fast answer within 20 minutes. Thank you | dybala