A navigational beacon in deep space broadcasts at a radio frequency of 50 MHz. A spaceship approaches the beacon with a relative velocity of 0.40c. What is the frequency of the beacon radio signal that is detected on the ship?
A) 66 MHz B) 76 MHz C) 55 MHz D) 71 MHz E) 60 MHz
B
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Advantages gained if a planet can be detected by both methods.
What will be an ideal response?
Are electric fields made of material particles such as atoms, and how do we know?
A) Yes, because electric fields have energy and all forms of energy are associated with material particles. B) No, because electromagnetic waves are able to cross regions of empty space containing no material particles. C) Yes, because the forces exerted by electric fields are always exerted on material particles such as atoms. D) No, because electric fields are observed to exist even within protons, and protons are not material particles. E) Yes, because everything is made of atoms.
A grating has 6.00 × 103 lines per centimeter ruled on it. What is the angular separation between the second and the third orders on the same side of the central order when the grating is illuminated with a beam of light of wavelength 550 nm?
A) 20.5° B) 30.5° C) 40.6° D) 50.5°
Heat is ________
a. a measure of the average kinetic energy of molecules in an object b. a property of an object c. the energy transferred between bodies due to a temperature difference d. the specific heat of an object