NEED ASAP PLEASE ! A 6.57 kg ball rolls across the street at a rate of 7 m/s. What is the KE of 2 . the ball before it hits the curb?
30 J
225.35 J
160.97 J

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?

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.