The contemporary explanation of the big bang states that early profound changes happened incredibly fast, sometimes in fractions of a second, at multibillion-degree temperatures.
a. true
b. false
a. true
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A negatively charged rubber rod is brought near the knob of a positively charged electroscope. The result is that:
A) electroscope leaves will move farther apart B) the rod will lose its charge C) electroscope leaves will tend to collapse D) electroscope will become discharged E) nothing noticeable will happen
One hemisphere of Encedalus has a much younger crust than the other, which is heavily cratered
Indicate whether the statement is true or false
The measured ratio of circumference to diameter on a disk is ? when the disk is
A) moving at relativistic speeds. B) rapidly rotating. C) at rest. D) all of the above E) none of the above
A bridge piling has a cross-sectional area of 1.250 m2 and supports a load of 1875 N. What is the stress on the column?
A) 1875 N B) 1875 N/m2 C) 1500 N/m2 D) 2344 N/m2