Questions

Radio waves have much longer wavelengths and lower frequencies than do visible light waves. In contrast, X-rays have much shorter wavelengths and higher frequencies. 

Ultraviolet Light (UV). part of the electromagnetic spectrum that consists of waves with frequencies higher than those of visible light and lower than those of x-rays.

Cuba

True, the given statement that the atmosphere is unaffected by changes in the geosphere.

RAM stands for Random Access Memory.

Three Logic Levels are used and they are High, Low, HIgh impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.

ECHO.

The processes in the controlling group are Verify Scope, Control Scope, Control Schedule, Control Costs, Perform Quality Control, Report Performance, Monitor and Control Risks, and Administer Procurements.