What is the average speed of a bird that flies 1 km in 30 minutes?

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

An object has a weight of 500 on earth what is the mass of this object

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