DNA molecules cannot be altered by chance errors in reproduction
Indicate whether the statement is true or false
F
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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
What is the average kinetic energy of an ideal gas molecule at 569°C? (The Boltzmann constant is 1.38 × 10-23 J/K.)
A) 1.74 × 10-20 J B) 5.81 × 10-21 J C) 1.18 × 10-17 J D) 3.93 × 10-19 J
Complete and balance the following equations:
a. HNO3 + Ba(OH)2 ? ____________________. b. H3PO4 + CaCO3 ? _____________________.
In this figure, if there were twice as much charge on the object on the right, would the forces still be equal and opposite?
a. Yes, but the magnitudes of the forces will be twice as large. b. Yes, but the magnitudes of the forces will be four times as large. c. No, because the magnitude of one of the forces would double. d. Yes, and the magnitudes of the forces remain as before. e. Yes, but the magnitude of the forces would be half as large.