An insect 5.75mm tall is placed 25.0cm to the left of a thin planoconvex lens. The left surface of this lens is flat, the right surface has a radius of curvature of magnitude 12.4cm , and the index of refraction of the lens material is 1.70. A. Calculate the location of the image this lens forms of the insect.
B. Calculate the size of the image.
C. Is the image real or virtual? erect or inverted
Repeat part A if the lens is reversed.
Repeat part B if the lens is reversed.
Repeat part C if the lens is reversed.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j. b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.