A convex mirror with a focal length of –28.0 cm forms an image 11.3 cm behind the surface. If the object height is 2.00 cm what is the image height?
a. 1.19 cm
b. 3.35 cm
c. 1.35 cm
d. 2.00 cm
e. 0.807 cm
a
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Which of these are SI units?
a. centimeters b. newtons c. pounds d. seconds e. none of the above
A measurement of an electron's speed is 2.0 × 106 m/s and has an uncertainty of 10%. What is the minimum uncertainty in position?
A) 0.29 nm B) 0.58 nm C) 0.87 nm D) 1.2 nm E) 1.6 nm
A lens of focal length 20 cm has an object of height 3.0 cm placed 100 cm in front of it. The image distance in this case is
A) 33 cm. B) 20 cm. C) 25 cm. D) 17 cm. E) -25 cm.
Of the four fundamental forces that act in the universe, which one supports a book that is at rest on a table?
A) the photon force B) the gravitational force C) the electromagnetic force D) the strong nuclear force E) the perpendicular force