a roller coaster car rapidly picks up speed as it rolls down a slope. as it starts down the slope, it’s speed is 4 m/s. 3 seconds later, at the bottom of the slope, it’s speed is 22 m/s. find the acceleration

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

is there any options? maybe im just not seeing them but i need the options to

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qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.

how important do you think an instrument is to the musician who plays it?