The focal lengths of the objective and the eyepiece in a microscope are 0.290 cm and 2.50 cm, respectively
An object is placed 0.300 cm from the objective. The image of this object is viewed with the eyepiece adjusted for minimum eyestrain (image at the far point of the eye) for a person with normal vision. What is the distance between the objective and the eyepiece?
A) 11.2 cm B) 11.5 cm C) 9.85 cm D) 10.4 cm E) 10.1 cm
A
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At the surface of Saturn's atmosphere the strength of the magnetic field is:
A) about the same as Mercury's magnetic field at its surface. B) about the same as Venus' magnetic field at its surface. C) about the same as Earth's magnetic field at its surface. D) about the same as Mars' magnetic field at its surface. E) about the same as Jupiter's magnetic field at its atmospheric surface.
In spite of its high temperature, we observe the solar corona best during ________
Fill in the blank(s) with correct word
State Kepler's second law
What will be an ideal response?
On a frictionless tabletop, a force is applied to an object: the object's velocity is horizontal and the force is perpendicular to the tabletop. Which of the following is true?
A. The total energy of the object does not change B. The applied force is friction C. There cannot be more than one force on the object D. The force does work on the object