Category: Physics

How do wind turbines work when it not windy? If there is too little wind and the blades are moving too slowly, the wind turbine no longer produces electricity. The turbine starts to create power at what is known as the cut-in speed. Power output continues to grow as the wind speed increases, but at […]

Can you buy a baby giraffe? There are only a few individuals who own giraffes, and these raise them so that eventually they can be purchased by a zoo. Simply put, giraffes are not only wild animals, but they can grow to more than 16-20 feet tall and weigh an average of 2,628 lbs. How […]

Can eye muscles get sore? When your eyes are not properly aligned, you may experience double vision, which the brain rejects. To compensate for the misalignment and keep your eyes moving in sync, the extraocular muscles have to work overtime. Eventually, these tiny muscles become strained and fatigued, leading to a range of painful symptoms. […]

What is 0.2 percent proof stress? The 0.2% offset yield strength (0.2% OYS, 0.2% proof stress, RP0. 2, RP0,2) is defined as the amount of stress that will result in a plastic strain of 0.2%. This is illustrated by the blue line in Figure 1 below. This is the yield strength that is most often […]

How does convection currents affect weather? During convection, cooler water or air sinks, and warmer water or air rises. This movement causes currents. These currents move water all around the earth, bringing warm water to cooler areas and vice versa. This redistributes thermal energy and causes changes in the weather. What are convection currents and […]

What is the life expectancy for a child with congenital heart defect? Survival. About 97% of babies born with a non-critical CHD are expected to survive to one year of age. About 95% of babies born with a non-critical CHD are expected to survive to 18 years of age. Thus, the population of people with […]

Which statement best describes the energy changes? The correct answer would be that atoms gain energy during evaporation and boiling. What are the 5 signs of a physical change? A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes […]

What is the first thing to do when a new system has been assembled built up and is ready for testing? What is the first thing to do when a new system has been assembled (built up), and is ready for testing? Pressurize with an inert gas and leak check. You just studied 25 terms! […]

What causes extreme laziness? Laziness may reflect a lack of self-esteem, a lack of positive recognition by others, a lack of discipline stemming from low self-confidence, or a lack of interest in the activity or belief in its efficacy. How can I stop being tired and lazy? Sleep suggestions: Get enough sleep. Adults need about […]

What are 5 benefits of cardiovascular fitness? Some of the many benefits of cardiovascular exercise include: increased heart muscle strength. improved cholesterol. stress reduction. lowered blood pressure. mood and self-esteem boost. weight control. improved sleep. What is cardiovascular fitness and give 2 examples? Viable options include hiking, jogging, cycling, rowing, running, and elliptical training. Just […]