The objective of a microscope has a focal length

of 0.80 cm and the eyepiece has a focal length

of 4.0 cm. An object is placed 1.50 cm from the

objective. The final image is formed at the near

point of the eye (25 cm).

a) Calculate the distance of the image from the objective.

b) Calculate the distance from the eyepiece lens of the image in part a.

c) Calculate the angular magnification of the microscope.

Find the mass by adding the numbers from the three sliders

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?

Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano.the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? positive force → balanced force → negative force negative force → balanced force → positive force positive force → unbalanced force → negative force negative force → unbalanced force → positive force