To change 50 g of boiling water to steam requires
A) 50 calories.
B) 500 calories
C) 540 calories.
D) more calories than is required to bring 50 g of ice at absolute zero to the boiling point.
E) none of the above
Answer: D
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An airplane travels 80 m/s as it makes a horizontal circular turn which has a 0.80-km radius. What is the magnitude of the resultant force on the 75-kg pilot of this airplane?
A. 0.69 kN B. 0.63 kN C. 0.66 kN D. 0.60 kN E. 0.57 kN
In a single-slit diffraction experiment, the width of the slit is 1.90 ?m. If a beam of light of wavelength 610 nm forms a diffraction pattern, what is the angle associated with the second dark fringe above the central bright fringe?
A) 11.4° B) 9.35° C) 12.2° D) 39.9° E) 18.7°
Type I supernovae result from white dwarf stars that have reached a mass of ________ solar masses from material transferred by a giant companion
Fill in the blank(s) with correct word
The diagram below illustrates two stars in a visual binary system and the center of mass of this system. Based on this diagram, what is the ratio of the mass of star A to the mass of star B?
a. 2 to 1
b. 1 to 2
c. 2 to 3
d. 3 to 2
e. 1 to 3