History homework help

History homework help. 1.A convex spherical mirror produces an image at 5.0 cm when the object causing the image is at 7.0 cm. Determine the focal length of this mirror.a. -17.5 cm b. -10.6 cm c. -2.9 cm d. -1.4 cm2.An object is placed 10.0 cm in front of a thin converging lens with a focal length of 8.0 cm. Which of the following is true?a. The image is virtual and inverted b. The image is virtual and upright c. The image is real and inverted d. The image is real and upright3.If the object in question #2 was slowly moved further from the lens would the image get bigger or smaller?a. It would get smaller b. It would get bigger c. It wouldn’t change size4.Two identical converging lenses (f = 15 cm) are used to create a multiple lens system. The lenses are separated by 50 cm. An object (4.0 cm in height) is placed 25 cm in front of one of the lenses. What is the final image height for one who views the object through both lenses?a. 36.0 cm b. 18.0 cm c. 9.0 cm d. 4.5 cm

History homework help