What is relational algebra explain with example?

What is relational algebra explain with example? RELATIONAL ALGEBRA is a widely used procedural query language. It collects instances of relations as input and gives occurrences of relations as output. It uses various operations to perform this action. The output of these operations is a new relation, which might be formed from one or more […]

How are electromagnets similar to generators?

How are electromagnets similar to generators? Generators are based on the connection between magnetism, motion and electricity. Generators typically use an electromagnet, which is created by electricity and a rapidly spinning turbine to produce massive amounts of current. The standard generator contains a group of insulated wire coils in the shape of a cylinder. How […]

What are the advantages and disadvantages of using CMM?

What are the advantages and disadvantages of using CMM? 3) Accurate dimensions can be obtained just by knowing the coordinates and distance between the two reference points. 4) Robustness against external force and error accumulation. Disadvantages: 1) The Coordinate measuring machines are very costly. 2) The CMMs are less portable. What are the advantages and […]

How do you find the voltage across an inductor?

How do you find the voltage across an inductor? You can calculate voltage across inductance by the formula V=L*(di/dt) where L is the inductance and di/dt is the derivative of current, change in current. What is the voltage across an inductor? What is the voltage across the inductor? The inductor equation tells us: v = […]

When should you always engage parking brake?

When should you always engage parking brake? You should use your emergency brake every time you park. It doesn’t matter if you’re on a hill or a flat parking lot, whether you drive an automatic or manual transmission, or whether the weather is pleasant or inclement. As the name suggests, you should also use your […]

Why should climate change stop?

Why should climate change stop? “Climate change exerts a de-stabilizing influence on an already-unstable world,” says Peter deMenocal, a climate scientist with Columbia University. “It adds a fundamental insecurity to people’s lives and livelihoods, from small island nations to the most developed nations in the world. Why is climate change so important? Climate affects nearly […]

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