A 500-N weight sits on the small piston of a hydraulic machine. The small piston has area 2.0 cm2. If the large piston has area 40 cm2, how much weight can the large piston support?

A) 25 N
B) 500 N
C) 1000 N
D) 10000 N
E) 40000 N


D

Physics & Space Science

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Two flanged shafts are connected by eight 18-mm bolts. The diameter of the bolt circle is 240 mm. The allowable shear stress in the bolts is 90 MPa. Ignore friction between the flange plates. The maximum value of torque T0 is approximately:

(A) 19 kN?m
(B) 22 kN?m
(C) 29 kN?m
(D) 37 kN?m

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If n moles of an ideal gas are compressed isothermally from an initial volume V1 to a final volume V2, what is the change in entropy?

A.

nR ln (V2/V1)

B.
nRT ln (V2/V1)

C.
nkB ln (V2/V1)

D.

E.
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Vector = 4.00 m points eastward and vector = 3.00 m points southward. The resultant vector + is given by

A) 5.00 m at an angle 36.9° south of east. B) 5.00 m at an angle 53.1° south of east. C) 5.00 m at an angle 71.6° south of east. D) 5.00 m at an angle 18.4° south of east. E) 5.00 m at an angle 26.6° south of east.

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