Did beast of no nation won an Oscar? “Beasts of No Nation” was one of the best films of 2015, yet it didn’t receive a single Oscar nomination. When you consider the Academy’s 87-year history of ignoring black performances—only 15 African Americans have won the honors for acting—the thought of unintentional bias doesn’t seem so […]
How can entropy be reduced?
How can entropy be reduced? When a small amount of heat ΔQ is added to a substance at temperature T, without changing its temperature appreciably, the entropy of the substance changes by ΔS = ΔQ/T. When heat is removed, the entropy decreases, when heat is added the entropy increases. Entropy has units of Joules per […]
What is the SI unit of viscosity and surface tension?
What is the SI unit of viscosity and surface tension? kgs−2,kgm−1s−1. Is surface tension a force? Surface Tension: “The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.” The cohesive forces between liquid molecules are responsible for the phenomenon known as […]
How many types of N95 masks are there?
How many types of N95 masks are there? The N95 respirator is the most common of the seven types of particulate filtering facepiece respirators. This product filters at least 95% of airborne particles but is not resistant to oil. This web page provides a table of NIOSH-approved N95 respirators, listed alphabetically by manufacturer. What are […]
What is the input impedance of a common emitter amplifier?
What is the input impedance of a common emitter amplifier? around 1kΩ How do you test for impedance? To find the output impedance the output voltage is measured first with no load resistor, then with a fixed load (purely resistive). To measure the input impedance over a complete spectrum of frequencies, use the following circuit: […]
What is the output frequency for a frequency division circuit that contains 12 flip flops with an input clock frequency of 20.48 MHz?
What is the output frequency for a frequency division circuit that contains 12 flip flops with an input clock frequency of 20.48 MHz? 12. Determine the output frequency for a frequency division circuit that contains 12 flip-flops with an input clock frequency of 20.48 MHz. Output Clock frequency = = 5000 i.e., 5 kHz. How […]
What is essential body fat?
What is essential body fat? Essential fat is the minimal amount of fat necessary for normal physiological function. For males and females, essential fat values are typically considered to be 3% and 12%, respectively. Fat above the minimal amount is referred to as nonessential fat. What is the function of essential body fat? Essential fat […]
What kind of piping is used in an ammonia refrigeration system?
What kind of piping is used in an ammonia refrigeration system? Steel piping What is refrigeration copper tubing? Copper, used for refrigeration, is designated as ACR copper. Measure the inside and outside diameter of the end of the tube. The outside diameter of Type L is always 1/8-inch larger than the size marked on the […]
Which is better AC or DC current?
Which is better AC or DC current? DC power is significantly more energy efficient than AC power. DC motors and appliances have higher efficiency and power to size characteristics. DC-based lighting (LED) is as much as 75% more efficient than incandescent lighting. Is AC safer than DC? A.C. is said to be four to five […]
What is an example of a mirage?
What is an example of a mirage? An example of a mirage is when you believe you see water or a ship in the desert when it isn’t really there. An optical phenomenon that creates the illusion of water, often with inverted reflections of distant objects, and results from distortion of light by alternate layers […]