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6. what was the geogcentric model
- only planets orbit earth. moons orbit planets
- everything: moons, planets and the sun all orbit earth
- everything orbits the sun
- the sun and moons orbit earth but the planets orbit the sun
7. why in space can no one hear you scream?
- because sound is a longitudinal wave which travels through particles and space is a vaccum
- because sound isnt a longitudinal wave and only longitudinal waves can travel in space
- becausesound is a transverse wave which can not travel in space as its a vaccum
- because if you took your helmet off in space you wouldnt have time to scream beofre you died
8. in regards to haves what is frequency measured in
9. what type of waves are EM waves
- some are transverse some are longitudinal
- neither
- transverse
- longitudinal
10. how do longitudinal waves travel?
- in vibrations at 90degrees in the direction of travel
- vibrations in the same direction that the wave is traveling
- vibrations at 45degrees in the same directionthat the wave is traveling
- at 180degrees in the direction of travel
11. why is light refelcted?
- because of the change in density from more to less dense
- because the densitys both remain the same
- because of the change in density from less to more dense
- bacause mirrors and puddles are reflective
12. what did the heliocentric model show?
- the moon and planets all orbit Earth but Earth orbits the sun
- moons, planets and the earth and the sun dont orbit anything
- the planets, moons and Earth all orbit the sun
- the planets, moons and sun all orbit Earth
13. why are waves referacted
- waves travel at the same speed objects just get in the way
- waves travel different speeds in all densities
- waves travel at different speeds in different dinsities
- waves travels at the same speed in different densities
14. what are relecting telescopes
- concave mirror and a converging lens
- a converging mirror and concave lens
- two concave lenses
- two converging lenses
15. when waves are reflected...
- the angle of refreaction is the same as the angle of incidence
- the angle of refraction is at 90degrees to the angle of incidence
- the angle of incidence is at 20 degrees to the angle of refreaction
- the angle of refection and the angle of incidence are both parallel
16. how do transverse waves travel?
- at 180degrees in the direction of travel
- vibrations in the same direction that the wave is traveling
- in vibrations at 90degrees in the direction of travel
- vibrations at 45degrees in the same directionthat the wave is traveling
17. what is the formula for speed?
- m= f X m/s
- m/h=F X m
- m/s=Hz X m
- m/s= Hz X e
18. who discovered ultraviolet radiation
- galileo
- herschel
- ritter
- newton
19. who discovered infrared radiation
- galileo
- newton
- herschel
- ritter