True or false
1. in a forced air heating system, the warm air circulates by convection. t/f
2. in an internal combustion engine, fuel burns outside the engine in chambers called cylinders.
3. solar energy can be changed into thermal energy without any work being done
4. winds are examples of convection currents

Select light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to the max. then, select the start button at the source location to begin producing the waves. light is a form of electromagnetic wave, containing oscillating electric and magnetic fields. the wave amplitude detector mentioned above shows how the electric field oscillates in time at the location of the probe. the amplitude of the wave at the location of the probe is equal to the maximum electric field measured. how does the amplitude of the wave depend on the distance from the source?