What are the characteristics of K type spectral stars? (site 1)

Which atomic model was proposed as a result of j. j. thomson’s work?

Which accurately compares concave and convex lenses?

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.