How do you determine density? The formula for density is the mass of an object divided by its volume. In equation form, that’s d = m/v , where d is the density, m is the mass and v is the volume of the object. The standard units are kg/m³. What is density measured in? Density […]
Does sound travel faster in humid air?
Does sound travel faster in humid air? Humidity lowers the density of air (so much for humid air feeling heavy!), which makes it travel slightly faster. Heat makes air molecules move around faster, so they’re more ready to carry a pressure wave than slower-moving molecules. Because of that, heat makes sound travel faster, too. What […]
What is the difference between expansion joints and control joints?
What is the difference between expansion joints and control joints? A control joint is a continuous vertical joint filled with mortar, but with a bond breaker on one side so that tensile stress cannot develop across the joint. An expansion joint is a continuous vertical or horizontal joint, left completely free of mortar and filled […]
What is the best selective herbicide?
What is the best selective herbicide? BEST POST-EMERGENT: Green Gobbler Vinegar Weed & Grass Killer. BEST SELECTIVE: Southern Ag Amine 24-D Weed Killer. BEST CONTACT: Spectracide Weed & Grass Killer Concentrate. BEST SYSTEMIC: Ortho Nutsedge Killer for Lawns. What is the difference between a selective and nonselective herbicide? Selective herbicides destroy certain plants as they […]
Which body parts are protected by your bones?
Which body parts are protected by your bones? Bones also protect the softer parts of our bodies. The skull is like a natural helmet which protects the brain. The spine protects the nerves in the spinal column. The ribs make a shield around our lungs, heart and liver. Which bones of your body Cannot move? […]
What does a wire mother mean?
What does a wire mother mean? This means she’s strict and doesn’t give her children much say in anything. When she expresses that she is a “wire mother”, she means that she isn’t giving her children the comfort they need from her. What three factors are necessary ingredients of parental love? Years ago I wrote […]
Is a hurricane like a giant tornado?
Is a hurricane like a giant tornado? No. a hurricane is basically a giant conglomerate of thunderstorms that are rotating in a low pressure system. in just the same way that thunderstorms are sustained by warm, moist air, hurricanes grow larger and more intense as they travel along the warm tropical oceans. What is the […]
What is the longest running empire in history?
What is the longest running empire in history? What are the longest-lasting empires, governments, or nations? The Pandyan Empire (1850 years) This society of Southern India is considered the longest-lasting empire in history. Byzantine Empire (1123 years) Silla (992 years) Ethiopian Empire (837 years) Roman Empire (499 years) San Marino (415+ years) Aboriginal Australian Cultures […]
What is the difference between long term and short-term environmental changes?
What is the difference between long term and short-term environmental changes? Short-term environmental changes, like floods, don’t give populations time to adapt to change and force them to move or die. These changes typically occur over days to hundreds of years. Long-term environmental changes, such as climate change, occur slowly over time and affect organisms […]
What most affects your speed around a curve?
What most affects your speed around a curve? Factor analysis of the data indicates that speed choice on curves can be described by four road-environment factors: separation of opposing traffic; cross-section characteristics; alignment; and signing. Why is it important to slow down when driving around a curve? Any speed or steering adjustments required while in […]