Aplant grows 3 inches in one month. why is this a physical change? a. the size of plant has changed b. the plant makes energy from the sun to grow the flower. c. heat of combustion from the sun grow the flower. d. special structures in the plant react with sunlight to make the flower.

If you mix chlorine lithium and nickel together which two elements would be the most reactive

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?