A proton is accelerated from rest through a potential difference of 2.5 kV and then moves perpendicularly through a uniform 0.60-T magnetic field. What is the radius of the resulting path?
a. 15 mm
b. 12 mm
c. 18 mm
d. 24 mm
e. 8.5 mm
b
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The Kuiper Belt is found where in the solar system?
A) among the orbits of the terrestrial planets B) beyond the orbit of Neptune C) between the orbits of Mars and Jupiter D) between the orbits of Jupiter and Uranus E) sixty degrees ahead of or behind Jupiter
Identify the FALSE statement:
A fifth-generation star would have a greater proportion of heavier elements than a second-generation star. The elements of any person's body were once star matter; therefore we are all literally made of stardust. Our Universe is so old there are no first-generation stars left in it. Dense regions of a nebula pull in surrounding material and therefore grow in mass and density and rotate faster. An accretionary disk eventually grows hot and massive enough to become a protostar, then a star.
Event A occurs before event B in a certain frame of reference. In another frame of reference, event A could occur
A) after event B. B) simultaneous with event B. C) either of these D) neither of these
Which of the following countries produces the most carbon from fossil fuels, per person?
A) China B) Japan C) Western Europe D) United States E) former Soviet Union