You and friend run up a fight of stairs that is 30 m high. both of you reach the top in 12 seconds. your weight is 570 n and your friend weights 620 n. which of you has more power? show all work

In a laboratory, nakisha mixes sodium hydroxide solution with an indicator called phenolphthalein. when combined, they create a pink solution. nakisha wonders if mixing other solutions with phenolphthalein will also create this pink color. how could she use the scientific inquiry process to explore it further?

Research and discuss the aurora borealis in terms of electric charges, magnetic fields, and forces. which times of the year are best for seeing the northern lights, and where are the best places to view them? explain your answers. also identify links to good images. if you’ve ever seen the aurora borealis, describe your experience and note the time and place that you saw it.

Answer fast! which lens can produce a virtual image and a real image? concave lens convex lens flat lens