How cell phone turn sound waves into a signal that can be sent

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Which statement best describes how private industry decides where to spend the money on research and development

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional