The electron microscope's main advantage over the optical microscope is which of the following?

a. greater ease of portability
b. dispenses with need for a lens
c. higher power lens used
d. higher resolution possible


d

Physics & Space Science

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The average orbital velocity in the Solar System is about _____

A) 10 km/s B) 20 km/s C) 30 km/s D) 40km/s

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Beats: Two tuning forks have frequencies of 440 and 522 Hz. What is the beat frequency if both are sounding simultaneously?

A. 962 Hz B. 481 Hz C. 82 Hz D. 55 Hz E. 41 Hz

Physics & Space Science

When does a charging capacitor stop charging?

a) when the amount of charge on the two plates is equal b) when the potential difference across the plates of the capacitor is equal to zero volts c) when the amount of charge on the two plates is infinitely large d) when the potential difference across the plates of the capacitor is equal to the emf of the battery e) when all of the charge available in the circuit has been forced to collect on the plates of the capacitor

Physics & Space Science

Which moon is rich in organic molecules but too cold to support chemical evolution?

a. Europa b. Titan c. Enceladus d. Io e. Ganymede

Physics & Space Science