Sound
3 classes of sound waves: Sonic, Ultrasonic, Infrasonic. Which has shortest wavelength?
Ultrasonic
Name three parts of atom in sequence from smallest to largest
Electron, proton, neutron
Sound waves cause air to oscillate. What do light waves oscillate?
magnetic and electric fields.
Order following colors in order of increasing wavelength: blue, red, yellow, green
blue, green, yellow, red
How does sun get its power? Which region of sun does process occur in?
Nuclear Fusion and Core
Are sound waves trancerse waves of longitudinal waves?
longitudinal
The force that keeps protons and neutrons in the nucleus. What causes the force?
nuclear force. Force caused by exchange of pions between protons and neutrons.
Name regions of the sun from inside to the outside
Core, Radioactive Zone, Convection Zone, Photosphere
Do radio waves longer or shorter wavelengths than visible light? What about x-rays?
RW longer than VL. X-rays shorter.
In both nuclear fusion and nuclear fission, what happens in comparison to the mass at the beginning and the end of these processes?
Mass larger in beginning than end
Jets traveling over Mach 1 do not travel in populated regions. Why?
Loud boom damages ears and buildings.
List number of protons, electrons, neutrons in 14C atom.
6 P, 6 E, 8 N
List three types of radioactive particles in order of ability to travel through matter. start with particle that can't pass through matter before stopping. End with one that passes through most matter before stopping.
Alpha particles, beta particles, gamma rays.
Light ray travels from air into glass. Angle of ray with perpendicular line to glass measured. Will refracted ray bend toward or away from line?
toward
Classify star with magnitude -7, Spectral Letter F
Supergiant
Astronaut has alarm clock in spacesuit and can hear alarm. Travels to surface of moon. Can she hear the alarm? Why or Why not?
No, no air on surface and air necessary for sound to oscillate.
Name daughter product in beta decay of 131I
53 protons and 78 neutrons. One neutron change to proton. 54 Protons and 77 neutrons= 131Xe
Watch lightning from storm.See flash of lightning and 1.5 sec later hear thunder. How far away is lightning strike? Temp is 13*C at time
V= (331.5 + 0.6X13)
V=339.3 m/sec
D= 33.9.3 x 1.5
D= 508.95 meters
Shirt dyed to look yellow. What color light does the dye absorb?
Absorbs all colors except yellow. red, orange, green, blue, indigo, violet
Star like sun has Spectral Letter of G. Specify minimum and maximum magnitude.
Between 2 and 8
You hear two musical notes with the same pitch. The first one is louder. Compare the wavelength, frequency, speed, and amplitude. What's the same and different?
WL, F, S are the same
Amp is different
half-life of 226Ra is 1600 years. Sample of 226Ra had 10 grams, how many grams of 226Ra will be left after 4800 years?
10/2=5/2=2.5/2=1.25gms
Mystery ?
All definitions are in your book. Look.
Cyan dye absorbs all color except blue and green. Cyan paper in dark room and blue light shined on it. What color do you see? What if yellow light shined on it?
Blue light- looks blue
Yellow light- looks black
Moving from left to right on the H-R diagram, do stars get warmer or cooler?
Cooler