The three basic items to make an electronmagnets are a source of current conducting wire and metal

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

If the textbook weighs 19.6 newtons on venus, what is the strength of gravity on venus?

What causes the formation of ocean currents?