13. The speed of a particular automobile is 45 mph (miles per hour). Use the following relationships to calculate the value in units of km/s (kilometers per second). 1 km = 0.62 mi 1h = 60 min 60 s = 1 min 14 Name the following noide ond bog ntifu og gith

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.