Shorter wavelengths (higher frequencies) correspond to higher energies and thus hotter star temperatures.  Don is sending out wavelengths, and wants them to correspond to lower energies. In order to best do this, Don will send out wavelengths that are longer or shorter?
longer
------
Thicker resistors offer less resistance than thinner resistors.  The larger a resistor equals less or more resistance?
less
------
The more dense the medium, the slower the light moves.  John was looking at the lights passing through the object. He noticed that the more dense the medium, the light would move Faster or Slower?
Slower
------
Faster-moving water has more energy.  If Jim increased the speed of water flowing out of his bathroom tap, what would happen to the amount of energy being transferred by the water would increase or would decrease?
would increase
------