Aplane heading due east with a velocity of 450 km/hr encounters a strong wind heading 20 degrees north of west with a velocity of 67 km/hr. what is the ground velocity of the plane.

An object is located 30.0 cm from a concave mirror. the focal length is 15.0 c,. what is the image distance? a. 30.0 cm b. -10 cm c. 10.0 cm d. -30.0 cm

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

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