A student is conducting an experiment to determine what will happen to the gravitation force of two boxes, with different masses, if the boxes are pushed together. One box has a mass of 100 g and the other box has a mass of 150 g. What will happen if these two boxes were moved closer together?

A. gravitational force would remain constant
B. gravitational force not be created
C. gravitational force would decrease
D. gravitational force would increase

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good

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.