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 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 […]
Can you suddenly become farsighted?
Can you suddenly become farsighted? Signs and Symptoms of Presbyopia The most common symptom of presbyopia is the sudden onset of farsightedness, meaning that your near vision will be blurry while your distance vision will be clearer by comparison. What is worse nearsighted or farsighted? Nearsightedness means that your cornea might have a greater-than-average curvature, […]
What are positive and negative coping skills?
What are positive and negative coping skills? Positive coping mechanisms include seeking help from supportive people, such as a counselor or friend. Other positive ways to cope include meditation, journaling, and exercising. A negative coping mechanism includes stress in which a person attacks others and makes them uncomfortable. What are some good coping skills? Good […]
What is the percentage of radioactive nuclei left after 3 Half Lives pass?
What is the percentage of radioactive nuclei left after 3 Half Lives pass? Thus the half-life of a nuclear decay process is the time required for the number of unstable nuclei to decrease from [A]0 to 1/2[A]0….Radioactive Decay Rates. Number of Half-Lives Percentage of Reactant Remaining 2 50%2=25% 12(12)(100%)=25% 3 25%2=12.5% 12(12)(12)(100%)=12.5% n 100%2n (12)n(100%)=(12)n% […]
How do rivers become larger as they travel across the land?
How do rivers become larger as they travel across the land? 1 Answer. Tributaries combine, adding water to rivers. A tributary is a stream that flows into a larger river. Small streams from around an area combine together to form a bigger tributary that eventually falls into rivers. What kind of organism makes up the […]
What is the role of parent material in soil formation?
What is the role of parent material in soil formation? The parent material of a soil determines the original supply of those nutrient elements that are released by weathering and influences the balance between nutrient loss and retention. Organic acids and exudates produced by microorganisms and plants enhance the weathering of minerals and the release […]
What does the radial velocity method measure?
What does the radial velocity method measure? The radial velocity technique is able to detect planets around low-mass stars, such as M-type (red dwarf) stars. This allows astronomers to determine the inclination of the planet’s orbit, which enables the measurement of the planet’s actual mass. Why is the radial velocity method biased towards high mass […]
What is killing the coral reefs?
What is killing the coral reefs? Despite their importance, warming waters, pollution, ocean acidification, overfishing, and physical destruction are killing coral reefs around the world. Genetics is also becoming a larger area of coral research, giving scientists hope they might one day restore reefs with more heat tolerant coral. How are humans killing coral reefs? […]
Can I check my iron levels at home?
Can I check my iron levels at home? The BIOSAFEAnemia Meter is the first FDA-approved, hand-held device that can be conveniently used at home to test hemoglobin levels (Figure 1). Low levels of hemoglobin may indicate anemia. Thus, the Anemia Meter may be used as an additional screening method. It is not recommended for use […]