11. Newton concluded that some force had to act upon the moonbecause Aa force is

Question

11. Newton concluded that some force had to act upon the moonbecause
Aa force is needed tokeep the moon in motion.
Ba force is needed to pullthe moon outward away from earth.
Ca force is needed to pullthe moon away from straight-line motion and hold it in orbit.
Dthe moon moves atconstant velocity. 12. Parallax is
Aindigestion.
Bthe apparent change inposition of a nearby object relative to the distant background,when the object is viewed from different perspectives.
Cthe greatest possibleangle between Venus and the sun as viewed from earth.
Dthe temporary reversal ofthe path of a planet across the background of stars due to therelative motion of the earth and the planet. 13. Radio waves travel at the same speed as
Avisible light
Bx-rays
Cmicrowaves
Dall of the above
Enone of the above 14. Violet light differs from red light in that
Aviolet light has ashorter wavelength than red light.
Bviolet light travels moreslowly (through a vacuum) than red light.
Cviolet light has a longerwavelength than red light
Dviolet light travels morequickly (through a vacuum) than red light. 15. Visible wavelengths of electromagnetic radiation have a rangeof wavelengths of
A1 to 100 nm.
B400 to 700 nm.
C90 to 130 nm.
D800 to 1900 nm. 16. Which ONE of the following statements is TRUE?
AVisible light takesup only a very small part of the total range of wavelengths in theelectromagnetic spectrum.
BVisible light takes upall of the electromagnetic spectrum.
CVisible light takes upmost (but not all) of the total range of wavelengths in theelectromagnetic spectrum.
DVisible light is NOT partof the electromagnetic spectrum. 17. Which of the following wave effects is NOT electromagnetic innature?
AMicrowaves
BRadio waves
CSeismic waves
DGamma rays 18. In what way does a photon of blue light NOT differ from aphoton of yellow light, in a vacuum?
AEnergy
BColor
CWavelength
DSpeed 19. Which of the following is an electromagnetic wave?
ASound wave
BMicrowave
CCosmic ray proton
DGravitational wave 20. Which of the following types of electromagnetic radiation hasthe longest wavelength?
AInfraredradiation
BRadio waves
CUltraviolet light
DMicrowaves

Explanation / Answer

11) C - for it to obey the first law a force is needed to keepit moving in a circle

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