Miguel claims that as a ball falls, it loses potential energy. Izzy claims that as a ball falls, it gains kinetic energy. Can both students be correct? Describe the evidence which would support each student's claim.

What defines the mass number of an isotope? a. the sum of the neutrons and protons b. the sum of the neutrons and electrons c. the number of neutrons d. the number of protons

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

If the speed of a particle triples ,by what factor does its kinetic energy increase?