Do safety glasses expire? Most goggles and safety glasses can technically last up to 3 years, but there is a grey area between when something is usable and when safety has been compromised. How long should a pair of safety glasses last? one to three years What is the standard for safety glasses? ANSI Z87.1 […]
What is hydrodynamic and thermal boundary layer?
What is hydrodynamic and thermal boundary layer? This thin layer of changing velocity has been called the hydrodynamic boundary layer; a concept first suggested by Ludwig Prandtl in the year 1904. Heat transfer occurs due to heat conduction and energy transport by moving fluid within this thin layer. What is the difference between hydrodynamic and […]
What happens if you apply greater force to an object?
What happens if you apply greater force to an object? The greater the force that is applied to an object of a given mass, the more the object will accelerate. For example, doubling the force on the object doubles its acceleration. Does greater speed mean greater force? Then what do forces do to an object? […]
How do I create a Monte Carlo simulation in Excel?
How do I create a Monte Carlo simulation in Excel? To run a Monte Carlo simulation, click the “Play” button next to the spreadsheet. (In Excel, use the “Run Simulation” button on the Monte Carlo toolbar). The RiskAMP Add-in includes a number of functions to analyze the results of a Monte Carlo simulation. How do […]
Why incremental development is the most effective approach for developing business software systems?
Why incremental development is the most effective approach for developing business software systems? Business software systems usually complex, software intensive, and frequently being changes when business goals or processes are changed. So incremental development is better. Real-time systems usually involve many hardware components which are not easy to change and cannot be incremental. Why do […]
Why does a mixed or unmixed fluid arrangement influence heat exchanger performance?
Why does a mixed or unmixed fluid arrangement influence heat exchanger performance? If you’re asking about the effect of mixing or not mixing a fluid as the fluid is passing through the heat exchanger, I believe that the reason mixing provides better performance is because a mixed fluid will transfer thermal energy, or really just […]
What causes crater wear?
What causes crater wear? Crater wear happens on the tool face at a short distance from cutting edge by the action of chip flow over the face at very high temperature. The crater wear is mainly due to diffusion and abrasion. They are commonly observed where the continuous chip is formed (usually in the ductile […]
What are the types of negative feedback?
What are the types of negative feedback? Negative Voltage Feedback Voltage-series feedback. Voltage-shunt feedback. How many types of negative feedback topologies are there? Negative feedback can be achieved via four different forms. They differ in how the input and output impedances are changed….3.4: The Four Variants of Negative Feedback. Type (in-out) Series-Series Zin High Zout […]
What are the two major thread standards?
What is the volume of a 10 mL graduated cylinder?
What is the volume of a 10 mL graduated cylinder? If you look at a 10mL graduated cylinder, for example, the smallest graduation is tenth of a milliliter (0.1mL). That means when you read the volume, you can estimate to the hundredths place (0.01mL). Use the bottom of the meniscus to determine the volume in […]