Astudent says that since the atomic theory is just a theory, it should not be considered useful. which statement best argues against the student’s opinion?

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

What happens when a rubber rod is rubbed with a piece of fur?