The ozone layer blocks much of the Sun's ________ radiation
A) gamma ray B) X-ray C) radio D) infrared E) ultraviolet
E
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The hot spots in a double-lobed radio source
a. appear to coincide with the location of the central galaxy responsible for the jets. b. are where hot excited gas interacts with the intergalactic medium. c. are only found near quasars. d. produce enough visible energy to be imaged at visible wavelengths. e. are always perpendicular to each other.
What is the effect of resonance on Mercury's rotation?
A. Mercury's spin has slowed down. B. Mercury spins three times on its axis for every two orbits. C. Mercury shows the same face to the Sun when Mercury is closest to it. D. All of these choices are correct.
A humming bird flying at 4 km/h that gets caught in a 3-km/h crosswind has a resultant speed of about
A) 3 km/h. B) 4 km/h. C) 5 km/h. D) more than 5 km/h.
If a surface has a work function of 1.5 eV and photons of energy 2.7 eV are shone on the surface, what is a possible kinetic energy of the electrons emitted from the surface?
A) 3.0 eV B) 2.0 eV C) 4.0 eV D) 1.0 eV E) No electrons are emitted.