Who was the first known contributor to the atomic theory? select one: a. thomson b. bohr c. dalton d. democritus

Aray diagram for a refracted light day is shown. what does the dashed line represent

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

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