Select the sentence that correctly uses commas in a non-restrictive phrase. a. A river, that is polluted, is unsafe for swimming.
b. Polluted rivers, which can exist anywhere, are unsafe for swimming.
c. When a river becomes polluted, it is no longer safe for swimming.
d. However, rivers sometimes become polluted when nearby farms use too many poisons.

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

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?