How do astronomers identify stars? Thus, astronomers can identify what kinds of stuff are in stars from the lines they find in the star’s spectrum. This type of study is called spectroscopy. The science of spectroscopy is quite sophisticated. Why do stars wobble? We all know that the chains of gravity shackle a planet to […]
Which of the following is the leading cause of death in midlife?
Which of the following is the leading cause of death in midlife? CLEVELAND – A recent vital statistics report from the U.S. Centers for Disease Control and Prevention (CDC) indicates cancer and heart disease remain the two leading causes of death for middle-aged Americans. What is the most common change in sleep patterns of adults […]
What are the three levels of physical activity?
What are the three levels of physical activity? Exercise is categorized into three different intensity levels. These levels include low, moderate, and vigorous and are measured by the metabolic equivalent of task (aka metabolic equivalent or METs). The effects of exercise are different at each intensity level (i.e. training effect). What are the aims of […]
How is wind speed indicated what is the unit used to define wind speed?
How is wind speed indicated what is the unit used to define wind speed? How is Wind Speed and Direction measured? Wind speed is typically reported in miles per hour, knots, or meters per second. One mile per hour is equal to 0.45 meters per second, and 0.87 knots. Wind direction is typically reported in […]
What is the angle of incidence when the incident ray is normal to the interface?
What is the angle of incidence when the incident ray is normal to the interface? Complete step-by-step answer: If the incident ray is on the same path as the normal to the surface, the angle of incidence will be zero. Therefore, the angle of incidence when light incident ray is along the normal to interface […]
Which layer is closest to space?
Which layer is closest to space? Layers of Earth’s Atmosphere exosphere—contains few particles that move into and from space. exobase—the lower boundary of the exosphere. thermosphere—temperature increases with height. The International Space Station orbits Earth in this layer. mesopause—the boundary between the mesosphere and the thermosphere; the coldest place on Earth. What layer are satellites? […]
What bank angle is a rate 1 turn?
What bank angle is a rate 1 turn? The bank angle required to conduct a turn at a specific rate is directly proportional to True Airspeed (TAS). The approximate bank angle required to accomplish a coordinated rate one turn (3°/second) can be calculated by dividing the TAS (in knots) by 10 and then adding 7. […]
What are the limitations of capture-recapture?
What are the limitations of capture-recapture? Mark / Recapture Techniques These techniques have a number of limitations: The animal usually needs to be captured to be marked, which may injure it, or alter its behaviour pattern. The mark used may harm the animal – for example a dot of a particular paint may turn out […]
What are the pros and cons of wind energy?
What are the pros and cons of wind energy? Pros and cons of wind energy Pros of wind energy Cons of wind energy Renewable & clean source of energy Intermittent Low operating costs Noise and visual pollution Efficient use of land space Some adverse environmental impact What are the negative effects of wind energy? As […]
What is the difference between the two igneous rocks?
What is the difference between the two igneous rocks? The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the […]