A student stands in a school hallway. A wall separates a classroom from the student. The student in the hallway cannot see inside the classroom
but hears noises from within the classroom. Which of these best explains
why the student hears the noises but cannot see into the classroom?

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Write down two additional questions about earth's magnetic field that will make your presentation more informative.