The elevators of a conventional airplane are used to provide rotation about the

If the pressure of a dry gas is reduced by one third, the volume will

An airplane wing is designed to produce lift resulting from relatively

An observer sees the flash of a gun three seconds before he hears the sound of the gun firing.  Approximately how far is the observer from the gun?   (speed of sound = 1100 ft/sec)

When a weight on a string is spun around and the string is released, the weight travels

The speed of sound

41) Sal’s dog Nymeria loves to see the mailperson because the mailperson always gives Nymeria a treat. The mailperson usually comes at around 1 PM, but sometimes comes as early as 11 AM and sometimes doesn’t come until 4 PM.  This is an example of what type of reinforcement schedule?

30) The three light waves pictured below will (all other things being equal) be perceived to differ in:   

35) Which of the following brain areas is most strongly involved in processing reward/reinforcement? 

36-37) The paragraph below should be used for questions 36-37.   Laurie is a vision scientist doing a demonstration. She places 5 pieces of paper in various locations and then measures the number of photons reflecting off them.   Paper #1: In direct sunlight, reflecting 50 photons Paper #2: In direct sunlight, reflecting 25 photons Paper #3: In direct sunlight, reflecting 10 photons Paper #4: In a shadow, reflecting 50 photons Paper #5: In a shadow, reflecting 25 photons   36) Which of the pieces of paper will be perceived as being the darkest/dimmest?