Magine that you are a parent, and your child is going to college in 2 years. tuition fees amount to $16,000 a year for each of the 4 years. you plan on depositing a lump sum of money today in a bank account paying 5% interest a year, so that you can make these annual tuition fee payments. the first tuition fee payment you make will be 2 years from now. calculate how much is the lump sum of money you need to deposit now in order to fund these annual tuition fee your answer to the nearest integer, e. g. enter 12345 if your answer is 12,345.2; enter 12346 if your answer is 12,345.7)

The equation that describes a transverse wave on a string is y = (0.0120 m)sin[(927 rad/s)t - (3.00 rad/m)x] where y is the displacement of a string particle and x is the position of the particle on the string. the wave is traveling in the +x direction. what is the speed v of the wave?

This is the substance(s) formed in a chemical reaction.

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.