Category: Physics

What are the different types of observation explain with examples? When it comes to observational research, you have three different types of methodologies: controlled observations, naturalistic observations, and participant observations. Let’s quickly look at what each type of observation includes, how they differ, and the strengths and weaknesses of each type of observation. What are […]

What words can you start a thesis statement with? The basic rules for writing a thesis statement are: State the topic or present your argument….For these, we recommend using one of the following sentence starters to write your thesis with: In this essay, I will … [Subject] is interesting/relevant/my favorite because … Through my research, […]

What is correct formula for calculating COP of heat pump? Answer. Explanation: COPHP = (Desired Output)/(Required Input) = (Heating Effect)/(Work Input) = QH/Wnet,in = 1 + (QL/Wnet,in) Both the COP of a refrigerator and a heat pump can be greater than one. What goes wrong with heat pumps? Some of the common issues covered in […]

What is the radius of a 2 inch EMT 90? EMT 90° Elbows Trade Size Metric Designator Radius (A)* 2 53 241 2 1/2 63 267 3 78 330 3 1/2 91 381 What is the multiplier for 45 degree bends? The errors in distance between bends for a 30 inch high offset varied from […]

How much effort is needed to lift a 100 N? Effort (Force) = 100 N / 2 = 50 N. What is law of lifting machine? Law of the machine. It is the relationship between the load lifted (W) and the effort applied (P). It is given by the equation, P = m.W+C. where. m […]

Do transistors amplify voltage? A transistor can amplify current and it can amplify voltage and it can do BOTH at the same time. A transistor can also amplify the voltage is “sees” on the base. It does this in common-emitter mode where the emitter is connected to the 0v rail and the collector has a […]

Does a bullet have more momentum than a ship? So yes, a tiny thing like a bullet can have the momentum of almost anything in size up to a modern cargo ship. The huge ship moves at less than 50 mph, the bullet would have to be propelled at millions of times that velocity to […]

Why can electric field lines never cross? Electric field lines cannot cross. This is because they are, by definition, a line of constant potential. The equipotential at a given point in space can only have a single value. If lines for two different values of the potential were to cross, then they would no longer […]

Are extension cords AC or DC? DC power supply cords are available in different lengths and can have either two or three prongs. A DC power extension cord is used to extend the length of a standard DC power cable. DC power extension cords have a plug on one end and one or more sockets […]

Is energy released when two hydrogen atoms form a covalent bond? The amount of energy released when the bond is formed is called the bond energy. Formation of a covalent bond releases the bond energy, which means that as the bond forms, the energy of the atom decreases. In the diagram below you can see […]