A soccer ball is kicked up with an initial velocity of vi = 40 m/s. How long will the ball be in the air for?

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

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