An electric clothes dryer draws 10 A at 220 V. If the clothes put into the dryer have a mass of 10 kg when wet and 3 kg dry, about how long does it take to dry the clothes? (Assume all heat energy goes into vaporizing water, Lv = 2.26 × 10^6 J/kg)
a. 171 min
b. 120 min
c. 51 min
d. 40 min
e. 5 min
b
Physics & Space Science
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Vision Problems: A nearsighted person wears contact lenses having a power of -0.15 diopters. What is the person's uncorrected far point?
A. 1.5 m B. 3.3 m C. 6.0 m D. 6.7 m
Physics & Space Science
When the position of a simple harmonic oscillator is equal to A/2, where A is the amplitude, the kinetic energy is:
A. (3/4)
B. (1/4)
C. (3/8)
D. (1/8)
E. (1/2)
Physics & Space Science
A simply supported beam is loaded as shown in the figure. The bending moment at point C is approximately:
(A) 5.7 kN?m
(B) 6.1 kN?m
(C) 6.8 kN?m
(D) 9.7 kN?m
Physics & Space Science
What is the bremsstrahlung process?
Physics & Space Science