Aplant uses the energy from sunlight to create oxygen and glucose from carbon dioxide and water. which statement is true about the changes that have occurred? a. a chemical change has occurred because new compounds have been produced. b. a chemical change has occurred because energy was needed. c. a physical change has occurred because the substances are still gases. d. a physical change has occurred because the plant looks different.
Answers: 1
Physics, 21.06.2019 21:40
Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?
Answers: 3
Physics, 22.06.2019 06:00
When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.
Answers: 2
Physics, 22.06.2019 06:30
If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.
Answers: 3
Physics, 22.06.2019 18:30
Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above
Answers: 2
Aplant uses the energy from sunlight to create oxygen and glucose from carbon dioxide and water. whi...
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