What is a mass defect and why is it important? The nuclear mass defect is a fundamental property of a nucleus and is a fixed value corresponding to a certain amount of binding energy for that nucleus. Mass defect and binding energy are important factors in the energy involved in nuclear reactions. Is binding energy […]
What two seasons begin on an equinox?
What two seasons begin on an equinox? More specifically, the start of each season is marked by either a solstice (for winter and summer) or an equinox (for spring and autumn). A solstice is when the Sun reaches the most southerly or northerly point in the sky, while an equinox is when the Sun passes […]
How can extinction affect humans?
How can extinction affect humans? As species disappear, infectious diseases rise in humans and throughout the animal kingdom, so extinctions directly affect our health and chances for survival as a species. The rise in diseases and other pathogens seems to occur when so-called “buffer” species disappear. Is extinction good or bad? Nevertheless, extinctions can have […]
Where is a delta found?
Where is a delta found? Deltas are located at river mouths. They usually exist at the mouth of a river entering an ocean. However, deltas can also be found where rivers meet a lake. While less common, sometimes deltas occur inland. What is Delta short answer? A delta is a triangular piece of land which […]
What is the angle of reflection for normal incidence?
What stays green all year round?
What stays green all year round? Evergreen plants and trees stay green all year long — hundreds of species thrive in climates around the world, including U. S. Department of Agriculture plant hardiness zones 8 through 10. Flowering evergreen plants, trees, shrubs, ground covers and vines bring color to gardens and landscapes. What is the […]
Is it safe to live near an active fault why?
Is it safe to live near an active fault why? The danger of living near fault lines Living near fault lines is inherently dangerous but difficult to avoid. The dangers people face include not only tremors but also other threats: Widespread smoke and ash can pollute the air and block out the sun for miles […]
What is the key difference between a physical and a chemical property?
What is the key difference between a physical and a chemical property? A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to […]
Why are bones spongy?
Why are bones spongy? Spongy bone reduces the density of bone and allows the ends of long bones to compress as the result of stresses applied to the bone. Spongy bone is prominent in areas of bones that are not heavily stressed or where stresses arrive from many directions. Is spongy bone soft? Though spongy […]
What is a normal aerobic capacity?
What is a normal aerobic capacity? Exercise physiologists evaluate aerobic capacity in terms of how much oxygen you use when you’re exercising. This is called oxygen “uptake.” It’s reported as milliliters of oxygen per kilogram of body weight per minute, which is abbreviated “ml O2/kg/min.”… AGE MEN WOMEN • 90-94 yrs 6.1 – 10 laps […]