Which of the following best explains why Pangaea broke apart into the modern-day continents? A. Earthquakes and volcanoes formed between the continents. B. Changing climate caused ice to form between the plates.
C. Balanced forces caused a change in the motion of the plates.
D. The plates underlying the continents were already in motion.

C. Balanced forces caused a change in the motion of the plates.

Explanation:

Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. This movement in the mantle causes the plates to move slowly across the surface of the Earth.

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)