Can mechanical energy of a moving particle be negative

Which of the following list the divisions of the geologic time scale in order from longest to shortest

*30 points + brainliest answer* gravity is pulling an object into the sun. the closer the object gets to the sun, the greater the gravitational force that acts on the object, increasing its acceleration. a line graph plotting the speed of the object against time would have which shape? a: straight line of positive slope b: curved line that slopes upward c: curved line that slopes downward d: straight line of negative slope

The water flowing over niagara falls drops a distance of 50 m. if all the gravitational potential energy is converted to thermal energy, by what temperature does the water rise? the specific heat of water is 4186 j/kg ∙ k. a)0.42 c° b)0.37 c° c)0.12 c° d)0.10 c°