light travels from water (n=1.33) into an unknown medium. if the angles of incidence is 30 and the angle of refraction is 24 what is the index of the refraction of the unknown medium

Which material produces static charge when rubbed?

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

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