A microscope has an objective lens of focal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from the objective
How far apart are the lenses?
A)
20 mm
B)
21 mm
C)
23 mm
D)
33 mm
E)
41 mm
E
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A) the Moon B) Mars C) Mercury D) Venus
Projectile Motion: A projectile is thrown upward at 24° with the vertical and returns to the horizontal ground 12.5 s later with no air drag.(a) How fast was it thrown?(b) How far from its original position did it land?(c) How high above its original position did it go?
What will be an ideal response?
Using graphical methods, estimate the temperatue distribution and the heat transfer per meter depth between the two surfaces at the corner shown in Figure 2-60.
The ionization energy for the hydrogen atom is 13.6 eV. What is the energy of a photon that is emitted as a hydrogen atom makes a transition between the n = 6 and n = 4 states?
a. 1.13 eV b. 0.47 eV c. 0.09 eV d. 3.40 eV e. 6.80 eV