Ablock starts at rest and slides down a frictionless track. it leaves the track horizontally, flies through the air, and subsequently strikes the ground. b b b b b b b b b b b b 472 g 4.1 m 1.8 m x v what is the speed of the block when it leaves the track? the acceleration of gravity is 9.81 m/s 2 . answer in units of m/s

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

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

Which radioisotope is used in dating geological formations?