A drive shaft running at 2500 rpm has outer diameter 60 mm and inner diameter 40 mm. The allowable shear stress in the shaft is 35 MPa. The maximum power that can be transmitted is approximately:
(A) 220 kW
(B) 240 kW
(C) 288 kW
(D) 312 Kw
(D) 312 Kw
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If the ac peak current through a 100 ohm resistor is 1.7 A, the average power dissipated by the resistance is
A) 85 W. B) 170 W. C) 289 W. D) 220 W. E) 145 W.
Three boxes rest side-by-side on a smooth, horizontal floor. Their masses are 5.0 kg, 3.0 kg, and 2.0 kg, with the 3.0-kg mass in the center. A force of 50 N pushes on the 5.0-kg mass, which pushes against the other two masses
What is the contact force between the 5.0-kg mass and the 3.0-kg mass? A) 0 N B) 10 N C) 25 N D) 40 N E) 50 N
What generally causes clouds to form?
A) falling relative humidity B) sinking of saturated air C) lifting of air D) addition of water vapor
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.5 cm, respectively. An object is placed 0.3 cm from the objective. The image of this object is viewed with the eyepiece adjusted for minimum eyestrain
What is the distance between the objective and the eyepiece? A) 9.85 cm B) 10.1 cm C) 10.4 cm D) 11.2 cm E) 11.5 cm