The latent heat of vaporization of sweat is 2 430 kJ/kg at body temperature. Assuming that sweating is the only mechanism for dissipating heat, what would be the maximum sustainable metabolic rate if 75% of the energy used by the body goes into waste heat? The body can produce up to 1.5 kg of sweat per hour
a. 4.9E+4 W
b. 4.9E+6 W
c. 2.2E+4 W
d. 1.4E+3 W
d
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A process for producing a product like a rubber glove is
(a) Injection molding (b) Extrusion (c) Slush casting (d) Calendaring
During a total lunar eclipse,
a. the Moon must be new. b. the observer must be in the path of totality. c. the Moon's color will be affected by Earth's atmosphere. d. the Moon must be at about its greatest distance from Earth. e. it must be near the time of one of the equinoxes.
A test tone used on a radio has a frequency of 1,000 Hz. What is the wavelength of this sound in air at normal room temperature? (The speed of sound is 344 meters per second.)
Two slits separated by 0.10 mm are illuminated with green light (? = 540 nm). Calculate the distance (in cm) from the central bright-region to the fifth bright band if the screen is 1.0 m away
a. 2.3 b. 2.5 c. 2.7 d. 2.1 e. 2.0