A slide projector needs to focus the image of a 24 mm × 36 mm slide onto a square screen 1.50 m on each side. You want to fill the screen as completely as possible without any of the image falling beyond the screen
Due to space constraints in the projector, the slide must be placed 10.5 cm from the lens. (a) What magnification does the projector produce? (b) How far from the lens should the screen be placed? (c) What focal length projector lens is needed?
(a) 41.7, (b) 4.38 m, (c) 10.3 cm
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____________ is the smallest of the large moons of Uranus and its surface has features called ovoids. These ovoids may have been formed by the upheaval of material by convection in the interior
Fill in the blank(s) with correct word
You observe a star in the disk of the Milky Way, and you want to plot the star on an H-R diagram. You will need to determine all of the following, except the
A) spectral type of the star. B) distance to the star. C) apparent brightness of the star in our sky. D) rotation rate of the star.
On a large scale, we find the universe to have voids and ________ structure
Fill in the blank(s) with correct word
Two observers, A and B, move relative to each other. A claims B's clocks run slow. In this case, B will claim A's clocks
a. run fast c. are no good b. run slow, too d. none of the above