In the brake system shown below, the clockwise couple Mc is applied to the brake drum C. (i) Determine the largest force exerted by the hydraulic cylinder on brake arm AB for which the brake drum will rotate if Mc is 300 Nm a. clockwise b. counterclockwise. The coefficient of static friction between the drum and arm is 0.50. (ii) If the coefficient of kinetic friction between the drum and arm is 0.40 and the hydraulic cylinder pushes end B to the left with a force of 1 kN, determine the friction force acting on the drum when the couple Mc is 300 Nm a. clockwise b. counterclockwise.

answer:

d. attempt to find the owner, then leave your information if you cannot find them.

explanation:

d. represents both (b) and (c).

more logical as well.

b and c are to complicated.

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answer: There's no different between us

Explanation:

A Carnot heat engine receives heat from a reservoir at 900$^\circ{}$C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 27$^\circ{}$C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at -5$^\circ{}$C and transfers it to the same ambient air at 27$^\circ{}$C. Determine (a) the maximum rate of heat removal from the refrigerated space and (b) the total rate of heat rejection to the ambient air. Answers: (a) 4982 kJ/min, (b) 5782 kJ/min