Category: Physics

What is the value of k in electrostatics? The symbol k is a proportionality constant known as the Coulomb’s law constant. The value of this constant is dependent upon the medium that the charged objects are immersed in. In the case of air, the value is approximately 9.0 x 109 N • m2 / C2. […]

What happens if you shine red light on a blue object? So what happens if you shine only red light onto a blue object? All of that red light gets absorbed and the blue object will seem to be dark, almost black. If you now shine a blue light onto that blue object all the […]

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 […]

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 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 […]

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 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 relationship between CO2 and temperature? When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down. How much does carbon dioxide contribute to global warming? Increases in atmospheric carbon dioxide are responsible for about two-thirds of the total energy imbalance that is causing […]

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! […]