Is Halloween on a Friday in 2020? Some good news this year: Many beloved holidays will fall on a Friday or Saturday. Valentine’s Day falls on a Friday. The Fourth of July falls on a Saturday. Halloween falls on a Saturday. How many Friday the 13th are there in 2020? two Friday What day is […]
How is power output measured?
How do you determine if a signal is energy or power?
When would you use a refractometer?
When would you use a refractometer? Refractometers are most often used in brewing to obtain quick measures of the specific gravity of unfermented wort. With a little more effort, however, you can obtain information about fermented worts — including finding the alcohol level in your beer and the original gravity from a finished beer! How […]
What is a semi-cantilever wing?
What is a semi-cantilever wing? Many high-wing airplanes have external braces, or wing struts, which transmit the flight and landing loads through the struts to the main fuselage structure. Since the wing struts are usually attached approximately halfway out on the wing, this type of wing structure is called semi-cantilever. What are the primary structures […]
What is the composition of lead free solder?
What is the composition of lead free solder? Lead-free solders in commercial use may contain tin, copper, silver, bismuth, indium, zinc, antimony, and traces of other metals. Most lead-free replacements for conventional 60/40 and 63/37 Sn-Pb solder have melting points from 50 to 200 °C higher, though there are also solders with much lower melting […]
What is a digital scale used for in science?
What is a digital scale used for in science? Digital scales give fast measurements and have easy-to-read automatic liquid crystal displays. They use advanced electronic circuitry to give a quick, accurate readout. Digital scales come in all sizes with a variety of weight capacities. What does a digital scale do? A digital scale is a […]
Who is allowed to remove a machine guard?
Who is allowed to remove a machine guard? Guards. Guards attached to mechanical equipment protect you from the moving parts of machines. Machine guards must never be removed and if a guard is damaged or missing, the machine must not be used until it can be repaired or replaced. A missing or damaged guard must […]
How does the pump performance vary with impeller diameter?
How does the pump performance vary with impeller diameter? The results show that changing the diameter of a pump impeller affects the flow, head and input brake horsepower of the pump in different proportions. The centrifugal pump gives a high flow rate as the diameter of the impeller increases. The impeller of a centrifugal pump […]
How do you display a file in Python?
How do you display a file in Python? Python File Open f = open(“demofile.txt”, “r”) print(f.read()) Open a file on a different location: f = open(“D:\\myfiles\welcome.txt”, “r”) Return the 5 first characters of the file: Read one line of the file: Read two lines of the file: Loop through the file line by line: Close […]