A nonprismatic cantilever beam of one material is subjected to load P at its free end. Moment of inertia I2 5 2I1. The ratio r of the deflection ?B to the deflection ?1 at the free end of a prismatic cantilever with moment of inertia I1 carrying the same load is approximately:
(A) 0.25
(B) 0.40
(C) 0.56
(D) 0.78
(C) 0.56
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An isolated black hole in space would be difficult to detect because
a. there would be no light source nearby.
b. it would not be rotating rapidly.
c. it would be stationary.
d. very little matter would be falling into it.
e. there would be very few stars behind it whose light the black hole could block out.
100 g of liquid nitrogen at its boiling point of 77 K is stirred into a beaker containing 600 g of 15°C water. If the nitrogen leaves the solution as soon as it turns to gas, how much water freezes? The heat of vaporization of nitrogen is 48 cal/g and that of water is 80 cal/g
a. none c. 68 g b. 29 g d. 109 g
The binding energy per nucleon of a nucleus
A) increases steadily as we go to heavier elements. B) is approximately constant throughout the periodic table, except for very light nuclei. C) has a maximum near iron in the periodic table and decreases after that for heavier elements. D) decreases steadily as we go to heavier elements. E) has a minimum near iron in the periodic table and increases after that for heavier elements.
Briefly discuss the Hubble constant
What will be an ideal response?