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What is the process called in which light bounces back from an object at the same angle and intensity as it is received by the object?

absorption

refraction

transmission

reflection

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m

Which is the most accurate name for the covalent compound p2o3?