Kim took 5 hours to complete a journey with an average speed of 80 km/h. For the first 3 hours, she travelled at an average speed of 60km/h. What was her average speed for the remaining time of the journey ?

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

Why is metal often used for cooking pan?

Which accurately compares concave and convex lenses?