If a man walks for 6 km at a steady speed of 3 km/h, how long will it take him?
What is the step by step process for that answer?

Which changes of state do the labels represent? a: b: c:

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation