the correct answer is convection and gravity . I hope this helps :)
Answer: C
Explanation: The evidence that percentages of adenine and thymine are approximately equal and likewise that of cytosine and guanine. This is based on Erwin Charging's base composition studies. The DNA nucleotide are arranged as base with adenine on one strand forming double bonds with thymine on the complimentary strand likewise cytosine on one strand forms triple bond with guanine on the complementary
Answer: Because The potential energy you build going up the hill can be released as kinetic energy — the energy of motion that takes you down the hill. Once you start cruising down that first hill, gravity takes over and all the built-up potential energy changes to kinetic energy. Gravity applies a constant downward force on the cars.Potential energy is the energy an object has as a result of its position. Potential energy is stored energy that has not yet been released. Gravitational potential energy is potential energy that results from an object's position in a gravitational field, and is equal to the object's weight multiplied by its height.
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Explanation: