Two loudspeakers emit sound waves along the x-axis. the sound has maximum intensity when the speakers are 19 cm apart. the sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 29 cm.

what is the wavelength of the sound?
express your answer using two significant figures.
\lambda =

{\rm cm}

part b
if the distance between the speakers continues to increase, at what separation will the sound intensity again be a maximum?
express your answer using two significant figures.

{\rm cm}

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

1.in one challenge on the titan games, competitors have to lift 200 pounds up a long ramp. angel is able to move the weight in 42 seconds. anthony gets it done in only 38 seconds. which statement is true? angel has more power than anthony. angel does more work than anthony. anthony does more work than angel. anthony has more power than angel. 2.a mountain climber exerts 41,000 j of work to climb a cliff. how much power does the climber need if she wants to finish in only 500 seconds? power = work / time 20,500,000 watts 82 watts 0.0122 watts 41,500 watts 3.your family is moving to a new apartment. while lifting a box 83 joules of work is done to put the box on a truck, you exert an upward force of 75 n for 3 s. how much power is required to do this? (hint: you only need two of the 3 numbers given! ) power = work / time 249 watts 25 watts 2075 watts 27.7 watts

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.