If a car used 250,000 W of power to complete a race in 12 s, how much work did the car do?

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 least penetrating form of radiation is

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.