ECHO2155 NEEDS TO STOP WHENEVER YOU SEE HIS QUESTIONS MAKE IT BE DELETED SO HE KNOWS HOW WE FEEL DELETE HIS ANSWER PS TOO

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

Which statement describes the formation of our sun? a disk formed of long trails of stars coiled into a spiral. it formed an elliptical flattened disk. heat and gases contracted within a nebula. gravity pushed stars away from a center core.

In a star, nuclear fusion occurs in the a. photosphere. b. corona. c. radiative zone. d. core.