GGRA02H3 Lecture 4: Lecture #4-The Global Supermarket Continued

An electron microscope uses a potential difference of 100 keV togenerate a beam of electrons. The limiting resolution of amicroscope is expressed as:

d = / 2NA

Where NA is the numerical aperture and is approximately 0.95

a. What is the kinetic energy of the electrons?
b. What is the wavelength of the electrons?
c. What is the limiting resolution of the electrons?
d. How does this resolution compare to an optical microscope?

hi,

i need help please, i have 2 questions i need theircompletesolutions



1)

A 20-kg object sitting at rest is struck elastically in ahead-oncollision with a 10-kg object initially moving at +3.0 m/s.Findthe final velocity of the 20-kg object after thecollision.



2)

A 7.0-kg bowling ball strikes a 2.0-kg pin. The pin fliesforwardwith a velocity of 6.0 m/s; the ball continues forward at4.0 m/s.What was the original velocity of the ball?



thanks in advance..