A drive shaft running at 2500 rpm has outer diameter of 60 mm and inner diameter of 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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In positron decay, the number of protons in the nucleus is
A) decreased by 1. B) decreased by 2. C) increased by 1. D) increased by 2. E) remains unchanged.
The large space telescope that has been placed into an Earth orbit has an aperture diameter of 2.40 meters. What angular resolution will this telescope achieve for visible light of wavelength ? = 4.80 × 10?7 m?
A. 2.44 × 10?7 rads B. 2.44 × 10?4 rads C. 2.44 × 10?3 rads D. 1.22 × 10?6 rads E. 2.00 × 10?6 rads
Which of the following occurs during an El Niño year?
A) Fishing catches improve along the South American coast. B) Cold water upwelling increases. C) The Trade winds become stronger. D) Storms increase on the western side of the Pacific.
The 4 new ‘planets' Galileo discovered are called the ___________________________
Fill in the blank(s) with correct word