You Are Measuring How Velocity Changes with Time of Two

question 46

Multiple Choice

You are measuring how velocity changes with time of two stars like the Sun in order to detect their planets. Both stars have a velocity curve with a periods of 2 years, but the maximum size (peak-to-peak amplitude) of the velocity curve of star A is 100 km/s, and for star B it is 200 km/s. What causes this difference? Assume the planets are named after their stars.

• A) Planet A is less massive than Planet B.
• B) Planet A is closer to Star A than Planet B is to Star B.
• C) Planet A is more massive than Planet B.
• D) Planet A is farther from Star A than Planet B is to Star B.
• E) Not possible to say, since you're measuring the velocity curve of the stars, not the planets.

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Definitions:

Rate-Limiting Step

The slowest step in a chemical reaction sequence which determines the overall reaction rate.

Reaction-Energy Diagram

A reaction-energy diagram graphically shows the energy changes that occur during a chemical reaction, from reactants to products, highlighting the activation energy and overall energy release or absorption.

Highest-Energy Structure

The conformation or arrangement of atoms in a molecule that has the highest potential energy, often least stable, compared to other conformations.

Molecular Collision

The process in which two or more particles (atoms, ions, molecules) come into close enough proximity to affect each other's trajectories or engage in a chemical reaction.