Two kilograms of water at 1.00 atm at the boiling point of 100°C is heated until all the water vaporizes. What is its change in entropy? (For water, Lv = 2.26 × 10^6 J/kg)
a. 12,100 J/K
c. 3030 J/K
b. 6060 J/K
d. 1220 J/K
A
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For an object in uniform circular motion, its velocity and acceleration vectors are always perpendicular to each other at every point in the path
A) True B) False
A circular steel rod 0.005 m in radius and 4.000 m long is subject to an axial force of 0.250 × 105 newtons. We observe that the rod elongates 0.616 × 10-2 m. Calculate the tensile stress and the axial strain in the rod.
What will be an ideal response?
What would be the weight of a 59.1-kg astronaut on a planet twice as massive as Earth and having twice Earth's radius?
A) 580 N B) 290 N C) 1160 N D) 118 N E) 1200 N
Carbon has a negative temperature coefficient of resistance of –0.5 × 10^–3 (°C)-1 . What temperature increase would result in a resistance decrease of 3% for a carbon resistor?
a. 60°C c. 20°C b. 100°C d. 40°C