Category: Physics

What is a negative reinforcement example? Deciding to take an antacid before you indulge in a spicy meal is an example of negative reinforcement. You engage in an action in order to avoid a negative result. One of the best ways to remember negative reinforcement is to think of it as something being subtracted from […]

What are the six major types of investigation? A six-step, structured approach to incident investigation (Fig 1) helps to ensure that all the causes are uncovered and addressed by appropriate actions. Step 1 – Immediate action. Step 2 – Plan the investigation. Step 3 – Data collection. Step 4 – Data analysis. Step 5 – […]

What is the velocity of a sound wave traveling through air at a temperature of 18 degrees C? 343m/s. Why is the speed of sound through medium C 0 M s? This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel […]

How do you get the perfect reverb on vocals? Move the pre-delay to about 30-40% or so as a starting point and see how it sounds. With your EQ, maybe set the high-pass around 200Hz and the low-pass at about 12kHz. In a situation like this, you may want to have more body in the […]

Is the cell membrane fully permeable? The cell wall is fully permeable to smaller molecules with the size of 30-60 kDa. The membrane is selectively permeable and controls the movement of the substance into and outside the cell. Functions include protection from the external environment. Do animal cells have a selectively permeable membrane? Cell Membranes. […]

How accurate is a DEXA scan for bone density? Depending on the study you read, the variability between DXA scans can be as high as 5% to 6%. Although 5% to 6% might sound like a small amount, changes in bone growth are measured down to the hundredth and even thousandth decimal point. Can a […]

What is wrong with the evolution? Evolution could be falsified by many conceivable lines of evidence, such as: the fossil record showing no change over time, confirmation that mutations are prevented from accumulating in a population, or. observations of organisms being created supernaturally or spontaneously. Why evolution is possible? Populations evolve. Because individuals in a […]

Why is McCulloch v Maryland important to understanding the changing nature of American federalism? The case McCulloh v. Maryland is important to understanding American federalism and the issue of implied powers. The national government built a national bank in Maryland and the state government of Maryland imposed taxes on the bank. Congress hoped that setting […]

How did Robert Wilson discover microwaves? The Large Horn Antenna and the Discovery of Cosmic Microwave Background Radiation. Bell Labs radio astronomers Arno Penzias and Robert Wilson were using a large horn antenna in 1964 and 1965 to map signals from the Milky Way, when they serendipitously discovered the CMB. What were Penzias and Wilson […]

What is the first thing a lost hunter should do? The first thing to do is admit to yourself that you are in trouble. Think about what you need to do to survive. Observe the area; and look for shelter, fuel, etc. Plan how you are going to use your survival kit and your other […]