A system is a group of related parts with specific roles that work together to achieve an observed result. The flow chart below shows a communication system. In this communication system, what does the transmitter do?

A. converts the message to a signal and sends it to a receiver
B. converts the message from electrical energy into sound energy
C. detects electrical signals produced by the receiver

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

where’s the list ? the question is incomplete