If you are holding a stack of books at your waist and then you walk across the room your hands did? 1) efficiency
2) power
3) work
4) no work

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

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

What are two different ways you could find the value of a? explain these methods.