If the sum of both the external torques and the external forces exerted on an object is zero, then the object must be at rest
A) True
B) False
B
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Which of the following is an advantage that liquid water has as a biological solvent compared to other alternatives?
A) when it freezes it becomes less dense B) it is a liquid over a wide temperature range and remains liquid at higher temperatures C) it is able to dissolve many things D) all of these are advantages
What is the average translational kinetic energy per molecule of an ideal gas at a temperature of ? The Boltzmann constant is 1.38 × 10-23 J/K
A) 1.7 × 10-21 J B) 8.3 × 10-21 J C) 6.2 × 10-21 J D) 2.1 × 10-21 J E) 4.1 × 10-21 J
The sidereal drive on a telescope mounting must turn the telescope eastward about the polar axis
a. True b. False Indicate whether the statement is true or false
Potential of Point-Charges: Three point charges, -2.00 ?C, +4.00 ?C, and +6.00 ?C, are located along the x-axis as shown in the figure. What is the electric potential (relative to infinity) at point P due to these charges? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) 
A. -307 kV B. +307 k V C. -154 kV D. +154 kV E. 0.00 kV