you have 2 equal masses m1 and m2 and a spring with spring constant k. the mass m1 is connected to teh spring snd placed on a frictionless horizontal surface at the relaxed portion of the spring. you then hang m2, connected to m1 by a massless cord, over a pulley at the edge of the horizontal surface. when the entiresystem comes to rest in the equilibrium position, the spring is stretched an amount d1. determine amount the spring stretched when m1 is attached to m2

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.