Why do black holes emit neither radiation nor other information? the answer to this question is related to the concept of escape speed—the speed necessary for one object to escape the gravitational pull of another object. the escape speed from an object depends entirely on its mass and radius. consider a star of a given mass. if the star remains the same mass, but decreases in radius, its escape speed will

He chart shows the 112th u.s. congress (2011–2012). based on the information in the chart, if the independents in the senate chose to vote with the republicans in the senate, the republicans would

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Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.