You hold a slingshot at arm's length, pull the light elastic band back to your chin, and release it to launch a pebble horizontally with speed 150 cm/s. with the same procedure, you fire a bean with speed 1050 cm/s. what is the ratio of the mass of the bean to the mass of the pebble?

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

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2