You use a camera with a lens whose focal length is 50.00 mm, and are taking a picture of a 2.500 m tall statue that is located 7.200 m from the lens. If the image height on the film is 18.20 mm, what is the distance from the lens to the film?
A. 5.035 cm
B. need more information
C. 6.32 mm
D. 5.242 cm
D. 5.242 cm
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A rectangular plate in plane stress is subjected to normal stresses ?x and ?y and shear stress txy. Stress ?x is known to be 15 MPa, but ?y and txy are unknown. However, the normal stress is known to be 33 MPa at counterclockwise angles of 358 and 758 from the x axis. Based on this, the normal stress ?y on the element in the figure is approximately:
(A) 14 MPa
(B) 21 MPa
(C) 26 MPa
(D) 43 MPa
Which of the following objects are probably not located in the same region of the solar system in which they originally formed?
A) Kuiper belt comets B) Oort cloud comets C) asteroids of the asteroid belt D) Pluto
Humanity has been thinking about the possibility of extraterrestrial life
A) since the first reports of unidentified flying objects in the 1940's B) since reports of canals on Mars were first made in the 1870's C) throughout human history since the time of the ancient Greeks
The scarps on Mercury are extremely similar to the cratered lunar highlands in appearance
Indicate whether the statement is true or false