____ has a negative charge and a mass about 2000 times smaller than a proton
a. A neutron
b. An electron
c. A molecule
d. A nucleus
e. An isotope
b
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Dimensional Analysis: When multiplying several quantities
A. the quantities can have any combination of units. B. the quantities must all have exactly the same units. C. the quantities must all be dimensionless.
Our Solar System:
is centrally positioned in the Milky Way galaxy. formed 10 billion years ago. has a massive, first-generation star at its center. completes one rotation around the center of the Milky Way every 250 million years. All of the above are true.
An ion enters a mass spectrometer which has a 0.18 Tesla field perpendicular to an electric field of 1.6 kV/m and selects a velocity. The same magnetic field is then used to deflect the singly charged ion into a circular path of radius 12.5 cm
(a) What velocity was selected? (b) What was the ion mass?
Describe the image formed by a convex lens when the object is closer to the lens than its focal length