American newspapers in the post-Civil War era expanded their circulation and public attention by
A. printing hard-hitting editorials.
B. crusading for social reform.
C. investigative reporting that uncovered public corruption in local and state government.
D. focusing on coverage of the local community and avoiding syndicalized material.
E. printing sensationalist stories of sex and scandal.
Answer: E
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According to Newton’s law of cooling, the time t needed for an object at an initial temperature 
to cool to a temperature T in an environment with ambient temperature 
is given by 
here k is a constant. Assume that for a certain type of container, k = 0.025 min–1. Let t be the number of minutes needed to cool the container to a temperature of 50°F. Assume that 
= 70.1 ± 0.2°F and 
= 35.7 ±
0.1°F. Estimate t, and find the uncertainty in the estimate.
According to Newton’s law of cooling, the time t needed for an object at an initial temperature to cool to a temperature T in an environment with ambient temperature
is given by
here k is a constant. Assume that for a certain type of container, k = 0.025 min–1. Let t be the number of minutes needed to cool the container to a temperature of 50°F. Assume that = 70.1 ± 0.2°F and = 35.7 ± 0.1°F. Estimate t, and find the uncertainty in the estimate.
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