Hi,Conclusiontime
The Dynamo theory explains why the earth is a magnet.
Answer:
Explanation:
Given
Two charges are separated by a distance d and exert a mutual attractive force F on each other.
Suppose 
and 
is the charge so force is given by
When distance is decrease to 
Force is given by
divide 1 and 2
thus the new force become 9 times of previous force
Answer:
The head on Collison because you have both cars going (for the sake of it 30mph) and they both collide the energy from that is 60mph because the speed is combined with the two cars.
Answer:
A signal is produced.
Radio waves are modulated and amplified.
Radio waves are amplified and demodulated.
A signal is seen, heard, or used.
Explanation:
Communication is the method of transmitting information between two or more participants. A radio communication network is a set of static and wireless radio equipment developed to facilitate an entity by enabling particular modes of communication such as one-to-many and one-to-one communication. Radio waves are being used to transmit information spatially from the sender to receiver, by modulating the radio signal in the transmitter. The above steps explains the loop of the radio communication system.
