What is the angle of reflection for normal incidence? When a ray of light is incident normally on a plane mirror it means that the angle of incidence is 0ₒ. From the law of reflection, we find that angle of reflection is also 0ₒ. Thus, for normal incidence on a plane mirror, angle of incidence […]
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 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 […]
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 […]
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 […]
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 […]
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 […]
What are the classes of dangerous goods?
What are the classes of dangerous goods? What are dangerous goods? Class 1: Explosives. Class 2: Gases. Class 3: Flammable liquids. Class 4: Flammable solids; substances liable to spontaneous combustion; substances which, on contact with water, emit flammable gases. Class 5: Oxidizing substances and organic peroxides. Class 6: Toxic and infectious substances. Class 7: Radioactive […]
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? […]