A student is investigating potential and kinetic energy by stretching a spring. When the student lets go, the spring recoils. At which point is the potential energy in the spring is being converted into kinetic energy in this system.

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Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

The identities of substances are the same before and after which type of change