Shock waves and a sonic boom occur when an object moves faster than the speed of sound
Indicate whether the statement is true or false
TRUE
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The elastic modulus of a material, except for elastomers, is proportional to the _____________of the interatomic potential.
Fill in the blank(s) with the appropriate word(s).
The percentage (by number of atoms) of the Sun that is hydrogen is about
A) 91%. B) 71%. C) 27%. D) 9%. E) less than 1%.
A barge with vertical sides is 10.0 m wide and 60.0 m long and is floating in fresh water. How much deeper into the water does the barge sink when 300,000 kg of coal are loaded on the barge?
A) 25.0 cm B) 50.0 cm C) 75.0 cm D) 1.00 m E) 1.50 m
The center of gravity is a useful point at which to balance an object. For instance, a ruler can be balanced by placing its center on your finger. Is it possible for the center of gravity of an object to be located at a point where no material exists to balance the object?
1.no, never 2.only for very unsymmetrical objects 3.It is possible in theory, but no objects have been found for which this occurs. 4.Yes, it is possible.