20.A sample of N = 9students has aΣX = 52and ΣX2= 322. For this sample, what is the standard deviation? Use the formula shown below. BE SURE TO ROUND OFF ALL DECIMALS TO 2 DECIMAL

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?

Did anyone do 1.06 lab: cloud formation i need with it i go to k12 lavcame i need to get it done quick