Is relative roughness dimensionless?

Is relative roughness dimensionless? Since the relative roughness is a dimensionless number, both the absolute roughness and diameter must carry the same units. What is equivalent roughness? The equivalent roughness of a mine roadway can be defined. as the roughness of a circular pipe, of which diameter is. equal to the hydraulic diameter of the […]

Which of the following is best example of greenhouse effect?

Which of the following is best example of greenhouse effect? Explanation: the best example of greenhouse effect: Cloud Effects at Night. Weather Requires the Greenhouse Effect. What is an example of the greenhouse effect? The greenhouse effect is a natural process that warms the Earth’s surface. Greenhouse gases include water vapour, carbon dioxide, methane, nitrous […]

What does a refrigeration cycle do?

What does a refrigeration cycle do? The purpose of the refrigeration cycle is to remove the heat in a given area and reject it outside. Less heat means a colder room! What is the difference between heat engine and heat pump?  A heat engine is a device that absorbs heat (Q) and uses it […]

What is the fracture toughness of a material?

What is the fracture toughness of a material? 17.7. “Fracture toughness” describes the resistance of brittle materials to the propagation of flaws under an applied stress, and it assumes that the longer the flaw, the lower is the stress needed to cause fracture. The ability of a flaw to cause fracture depends on the fracture […]

What is a quasi-equilibrium process?

What is a quasi-equilibrium process? In thermodynamics, a quasi-static process (also known as quasi-equilibrium, from the Latin quasi, meaning ‘as if’), is a thermodynamic process that happens slowly enough for the system to remain in internal equilibrium. Any reversible process is a quasi-static one. Why quasi static process is important? Equilibrium in a system in […]

What is human-computer interaction and why is it important?

What is human-computer interaction and why is it important? Human-computer interaction (HCI) is a multidisciplinary subject that focuses on computer design and user experience. It brings together expertise from computer science, cognitive psychology, behavioural science, and design to understand and facilitate better interactions between users and machines. How human-computer interaction affects the society today? The […]

How do I change text to mtext?

How do I change text to mtext? From text to Mtext Choose Express> Text> Convert Text to Mtext. At the Select objects: prompt, select the text objects that you want to convert. If you press Enter instead, you get the Text to MText Options dialog box. How do you change the text style in AutoCAD? […]

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