ACT Practice
Question of the Day

Work on that higher ACT score every day by building practice into your daily routine.

Complete this question, then sign up below!

Sign up below to receive a test-like question in your inbox every day.

ACT Question for April 23rd

Stars are essentially fusion reactors, converting hydrogen into helium, thus releasing light and heat energy.  Approximately 90% of stars are main sequence stars, which have a proportional relationship of temperature vs. luminosity.  This relationship can be observed as a function of their color, as seen in Figure 1. The lifespan and stages of a star largely depend upon its mass.  Figure 2 shows the relationship between the temperature of a main sequence star and its mass.

What would be the approximate solar mass of a blue-white star?

Ready for a higher score on the ACT?

Let's get started

Kaplan | 750 Third Ave | New York, NY 10017
© Kaplan Inc. All Rights Reserved.
Terms of Use

Question ID: 5892