Which organisms are the oldest to most recent, based on scientific views?
a.
cyanobacteria, birds, sea scorpion, saber-toothed cats
b.
birds, saber-toothed cats, sea scorpion, cyanobacteria
c.
cyanobacteria. sea scorpion, saber-toothed cats, birds
d.
cyanobacteria, sea scorpion, birds, saber-toothed cats

What is the coefficient of kinetic friction μk between the block and the tabletop?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.