A 10.0 cm high candle is placed 15 cm in front of a concave mirror. If the image of the candle appears 9 cm away from the vertex, what is the image height and inversion?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

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

Name three populations commonly found in a prairie system