Halley's comet has an orbital period of 76 years, what is the average distance of Comet Halley from the Sun?
a. 51 AU
b. 18 AU
c. 114 AU
d. 660 AU
e. 38 AU
b
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A plane truss with span length L 5 4.5 m is constructed using cast iron pipes (E 5 170 GPa) with a cross-sectional area of 4500 mm2. The displacement of joint B cannot exceed 2.7 mm. The maximum value of loads P is approximately:
(A) 340 kN
(B) 460 kN
(C) 510 kN
(D) 600 kN
In a double-slit experiment, the distance between the slits is 0.2 mm and the distance to the screen is 150 cm. What is the phase difference (in degrees) between the waves from the two slits arriving at a point P when the angular distance of P is 10° relative to the central peak, and the wavelength is 500 nm? (Convert your result so the angle is between 0 and 360°.)
a. 145° b. 155° c. 165° d. 135° e. 95°
A refrigerator is an example of a heat mover
Indicate whether the statement is true or false
In general, a stream with a high discharge tends to have
A) increased laminar flow. B) increased turbulent flow. C) a high velocity. D) a narrow stream channel.