Which describes the changes in Earth's motion? The speed increases from W to X because a
component of the gravitational force acts in the
direction opposite to the velocity
The speed increases from W to X because a
component of the gravitational force acts in the
direction of the velocity.
The speed increases from X to W because a
component of the gravitational force acts in the
direction opposite to the velocity.
The speed increases from X to W because a
component of the gravitational force acts in the
direction of the velocity.

May someone explain how to do this question?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

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.