Rhea is running towards Sean and kicks a soccer ball to him. Sean is standing still.
Which statement best describes the speed of the ball
from Sean's frame of reference and Rhea's frame of
reference?
O The speed of the ball from Sean's reference frame
would be greater than the speed of the ball from
Rhea's reference frame.
O The speed of the ball from Sean's reference frame
would be less than the speed of the ball from Rhea's
reference frame.
The speed of the ball from Sean's and Rhea's
reference frames would be 0 km/h.
O The speed of the ball from Sean's and Rhea's
reference frames would be less than 0 km/h.

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.