Answers only, please. Thank you 18. A uniform rectangular board has a length of 8.0 cm and a width of 6 cm. Its center of gravity will be at a point along its diagonal ___ from vertex V. a. 3.0 cm b. 4.0 cm c. 5.0 cm d. none of these 19. When applying Newton’s law and equations top a large object we treat the mass of the whole object to be concentrated at the ____ of the object. a.lowest point b. outer surface c. center of gravity d. noneof these 21. Consider two objects with masses 5 x109 and 3 x 107 kg respectively. What should be their separation distance r so that the gravitational force between them is essentially zero? a. r=0 b. r = 10 m c. r = 100 m d. r is infinitely large 22. The value pf the potential energy and kinetic energy in simple harmonic oscillator is ___. a. equal b. unequal c. O d. none of these 27. the amount of heat capacity per unit mass of a substance. a. heat capacity b. specific heat c. kilocalorie d. none of these
Answers only, please. Thank you
18. A uniform rectangular board has a length of 8.0 cm and a width of 6 cm. Its center of
gravity will be at a point along its diagonal ___ from vertex V.
a. 3.0 cm b. 4.0 cm c. 5.0 cm d. none of these
19. When applying Newton’s law and equations top a large object we treat the mass of the
whole object to be concentrated at the ____ of the object.
a.lowest point b. outer surface c. center of gravity d. noneof these
21. Consider two objects with masses 5 x109 and 3 x 107 kg respectively. What should be
their separation distance r so that the gravitational force between them is essentially zero?
a. r=0 b. r = 10 m c. r = 100 m d. r is infinitely large
22. The value pf the potential energy and kinetic energy in simple harmonic oscillator is ___.
a. equal b. unequal c. O d. none of these
27. the amount of heat capacity per unit mass of a substance.
a. heat capacity b. specific heat c. kilocalorie d. none of these
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