How are radio waves generated? How are they detected? What do you think limits the highest radio frequency that can be generated?
Radio waves are generated and detected by an LC circuit. The highest frequency is
limited by the physical dimensions of the LC circuit.
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Sometimes a flashlight filament glows red instead of white, which indicates a lowness of
A) current in the filament. B) filament temperature. C) both of these D) neither of these
Name two ways the magnetic fields of Uranus and Neptune defy the normal behavior of planetary magnetic fields
What will be an ideal response?
Which of the following statements is true about any collision between two objects with no net applied force acting?
a. Momentum is never conserved and kinetic energy is always conserved. b. Momentum is always conserved and kinetic energy is never conserved. c. Momentum is always conserved and kinetic energy is sometimes conserved. d. Momentum is sometimes conserved and kinetic energy is always conserved. e. Momentum and kinetic energy are both always conserved.
A spaceship is 25 m wide and 100 m long. When traveling at 0.80 c (in a direction along its length), what is its observed width?
A. 42 m B. 25 m C. 16 m D. 15 m E. 20 m