An object is slowing down while traveling clock-wise around a circle of constant radius. Which of the following statements are true regarding this situation? a. The object's acceleration vector points directly towards the center of the circle.
b. The object's acceleration vector has a component that points towards the center of the circle.
c. The object's acceleration vector has a component that points radially outward.
d. The object's acceleration vector has a component that points tangent to the circle and in the direction of its motion.
e. The object's acceleration vector has a component that points tangent to the circle and in the opposite direction of its motion.
f. The object's angular acceleration is positive.
g. The object's angular acceleration is negative,

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.