Iwill give 20 points scientists have determined that the oldest fossils, representing earth’s earliest life-forms, are 3.5 billion years old. which description of these life-forms is accurate? a. reddish eukaryotic cells b. blue-green photosynthetic bacteria c. orange-colored protists d. multicellular organisms, mostly blue in color

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

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(jacemorris04)