An optical instrument consists of two lenses. If the object lens distance for lens 1 is 12cm the the image distance is 36cm. If the height of the object for 2 lens is 5cm then the image height is 2.5 cm. Evaluate the combined magnification of the two lenses.

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Which branches of natural science include the study of an organism that lived 10 million years ago