Convert 1.2 × 10-3 to decimal notation
A) 1.200
B) 0.1200
C) 0.0120
D) 0.0012
E) 0.00012
Answer: D
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Determine the overall thermal resistance per unit area for the wall shown in Figure 2-51. Exclude the thermal resistance due to convection heat transfer in the analysis. Then, if the heat transfer is expected to be 190W/m^2 and the exposed brick surface is 10ºC, estimate the temperature distribution through the wall.
A motorcycle of mass 100 kilograms slowly rolls off the edge of a cliff and falls for three seconds before reaching the bottom of a gully. Its momentum upon hitting the ground is
A) 1,000 kg m/s. B) 2,000 kg m/s. C) 3,000 kg m/s. D) 4,000 kg m/s. E) 9,000 kg m/.
Heat energy is measured in units of
A) degrees. B) joules. C) calories. D) both joules and calories.
What is the escape speed from a planet of mass m and radius r if m = 3.2 × 10^23 kg and r = 2.4 × 10^6 m?
a. 5.5 km/s b. 4.2 km/s c. 5.2 km/s d. 4.8 km/s e. 3.7 km/s