A cyclotron of radius 0.25 m accelerates protons in a 1.7-T magnetic field. What is the frequency for the applied alternating voltage?
A)
0.26 MHz
B)
2.6 MHz
C)
26 MHz
D)
260 MHz
E)
2600 MHz
C
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The _______________ of Jupiter's rings indicated that the rings are made mostly of microscopic particles
Fill in the blank(s) with correct word
The carbon in your body was formed in nuclear reactions in long-dead stars. How much energy was released when three 4He nuclei combined to make 12C? The mass of 4He is 4.002603 u, the mass of 12C is 12.0000 u, and 1 u = 931.494 MeV/c2
A) 7.274 MeV B) 3716 MeV C) 8.424 MeV D) 2.106 MeV
In March 2004, a new world, Sedna, with a comet-like orbit and a perihelion over three times farther out than Pluto's was announced. What did this do to Pluto's status as a major planet?
What will be an ideal response?
Which of the following correctly describes the concept of galactic recycling?
A) New stars are continuously being formed in the Milky Way out of gas that has been ejected from a previous generation of stars. B) In the formation of a star, no matter is wasted as all excess material ends up recycled into planets. C) Stars near the center of the Milky Way are continually recycled to the outskirts of the disk by their orbital motion. D) Life is continuously being spread from star to star in the Milky Way. E) New galaxies are continuously being formed out of gas ejected from a previous generation of galaxies.