Suppose working outside on a hot day someone generate 450 J of heat each second. If this energy is compensated for by the evaporation of sweat, how much water would be lost in an hour? The latent heat of fusion for water is 334 kJ/kg and for vaporization is 2,200 kJ/kg
a. 4.85 liter
c. 0.50 liter
b. 0.74 liter
d. 1.5 liter
B
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Dielectrics: A 6.0-?F air-filled capacitor is connected across a 100-V potential source (a battery). After the battery fully charges the capacitor, it is left connected and the capacitor is immersed in transformer oil, which has a dielectric constant of 4.5. How much additional charge flows from the battery onto the capacitor during this process?
A. 1.2 mC B. 1.7 mC C. 2.1 mC D. 2.5 mC
What force is necessarily applied to the 2.5 cm-diameter piston of a hydraulic lift system in order to lift a truck of mass 1210 kg upon a platform supported by a 15 cm-diameter piston?
A. 33.6 N B. 1980 N C. 330 N D. 494 N E. 4850 N F. 202 N
Discuss the role that methane plays in the appearances of Neptune and Uranus
What will be an ideal response?
A plane flies directly from city A to city B, which are separated by 2300 mi. From A to B, the plane flies into a 65 mi/h headwind. On the return trip from B to A, the wind velocity is unchanged
The trip from B to A takes less than the trip from A to B. What is the airspeed (assumed constant) of the plane relative to the air (that is, the airspeed)? A) 530 mi/h B) 610 mi/h C) 480 mi/h D) 400 mi/h