Books with author James Roland

Black holes are one of the greatest mysteries of outer space. No visible light can escape the strong gravity of a black hole. This makes black holes invisible―and very difficult to study. But scientists make new discoveries and develop new theories about these mysterious objects every day. In 2015, astronomers were able to finally confirm a theory that Einstein had developed one hundred years earlier! And in 2016, scientists found that black holes may form in a different way than they ever thought possible. Read this book to learn more about the incredible and mind-boggling science of black holes.

Men and women interested in designing and building bridges, ships, highways, dams, airports, or other large-scale projects people use every day can find nearly endless opportunities in civil engineering. A civil engineering career can take you to the top of a skyscraper, to the middle of the ocean, to an underground tunnel, and to one day, perhaps, a colony on Mars. What the job entails, what it pays, and future prospects are discussed along with insights from industry insiders.

Did you know that electric current can be controlled? Have you ever wondered how that might be done? Transistors can act as amplifiers, taking in a small current and sending out a larger one, or as switches, turning electric current on and off. But how do these different transistors work? How are they used in our electronic devices? Discover the history of how transistors were developed, explore how different types of transistors can play different roles in electronics, and learn where transistors may be taking technology in the future!

Black holes are one of the greatest mysteries of outer space. No visible light can escape the strong gravity of a black hole. This makes black holes invisible—and very difficult to study. But scientists make new discoveries and develop new theories about these mysterious objects every day. In 2015, astronomers were able to finally confirm a theory that Einstein had developed one hundred years earlier! And in 2016, scientists found that black holes may form in a different way than they ever thought possible. Read this book to learn more about the incredible and mind-boggling science of black holes.

Have you ever wondered how electricity powers your home or school? What about how that electricity travels? In any device that uses electricity, inside is a small path called a circuit through which electricity travels. Whether we see them in these devices or not, circuits are constantly at work. But how do circuits work? How were they invented? Explore the key concepts that make up a circuit, including the power source, conducting path, and load. Learn how circuits power devices of all sizes, from computers to the lights in your home to satellites in outer space!

Have you ever wondered how electricity powers your home or school? What about how that electricity travels? In any device that uses electricity, inside is a small path called a circuit through which electricity travels. Whether we see them in these devices or not, circuits are constantly at work. But how do circuits work? How were they invented? Explore the key concepts that make up a circuit, including the power source, conducting path, and load. Learn how circuits power devices of all sizes, from computers to the lights in your home to satellites in outer space!

"Virtual reality creates three-dimensional environments that have been used to enhance video games for several years. Now this amazing technology is helping surgeons plan complex operations, medical students learn anatomy without cadavers, and patients cope with physical pain and the emotional challenges of long-term hospital stays. These and other virtual reality developments are changing the way doctors deliver health care and teach medicine to students and physicians in remote corners of the world"--

Did you know that Pluto has mountains, glaciers, and even blue skies? In July 2015 a spacecraft called New Horizons finally reached Pluto―almost ten years after it had launched! The spacecraft flew by Pluto to take the first close-up photos of the dwarf planet. When it began sending those photos back to Earth, scientists were amazed by what they saw. Pluto was more fascinating than scientists ever imagined! Read this book to learn more about New Horizons, its long journey to Pluto, and the things scientists learned from the photos of this distant dwarf planet.

Did you know that Pluto has mountains, glaciers, and even blue skies? In July 2015 a spacecraft called New Horizons finally reached Pluto—almost ten years after it had launched! The spacecraft flew by Pluto to take the first close-up photos of the dwarf planet. When it began sending those photos back to Earth, scientists were amazed by what they saw. Pluto was more fascinating than scientists ever imagined! Read this book to learn more about New Horizons, its long journey to Pluto, and the things scientists learned from the photos of this distant dwarf planet.