Which surface most likely has the least friction?

a) a carpeted floor
b) a paved road
c) a rocky path
d) a water slide

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

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

J. j. thomson’s experiment disproved the theory that an atom