Answer:
Explanation:
Earliest standards were dependent on a single frequency/channel to both send and receive. This shared medium creates the same problem as half-duplex coax cable. Because receivers had to wait for the signal before sending a response, this reduced the overall bandwidth.
Other factors affect wireless signal propagation, too, including RF interference, antenna choice, and obstacles such as walls, trees, and even weather (precipitation, for example).
You don't have a following space exploration
The forces the people exert on the plank is 100.45N
<u>Explanation:</u>
Force of man 1 on plank = 
Force of man 2 on plank = 

Gravitational force on plank = 
Gravitational force on box = 
Given hint is forces of people is equal to forces on plank and box

in the state of equilibrium normal force is equal and opposite to gravitational force.