What are the two types of speed? There are two types of speed: result-speed and task-speed. What is velocity and how is it calculated? Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) […]
How do you start an answer?
How do you start an answer? Begin your answer by rephrasing the essay question as a statement. The best way to start an essay answer is to rephrase the question in the form of a statement. Opening your essay in this way signals to the professor that you have read and understood the question. How […]
Does a mirror reflect or absorb light?
Does a mirror reflect or absorb light? Mirrors do absorb light. The mirror consists of molecules arranged, such that it reflects maximum of the absorbed light Ray,with rear side coated with another surface of material such that it does not allow the partially absorbed light Ray to come out. Does light scatter hit glass? Light […]
How does physics help you as a student?
How does physics help you as a student? The goal of physics is to understand how things work from first principles. Courses in physics reveal the mathematical beauty of the universe at scales ranging from subatomic to cosmological. Studying physics strengthens quantitative reasoning and problem solving skills that are valuable in areas beyond physics. What […]
Is the parent or daughter radioactive?
Is the parent or daughter radioactive? Radioactive Isotopes The radioactive decay of a parent isotope (the original element) leads to the formation of stable daughter product, also known as daughter isotope. As time passes, the number of parent isotopes decreases and the number of daughter isotopes increases (Figure below). Which method is used to date […]
Do wind turbines increase global warming?
Do wind turbines increase global warming? The conversion of wind energy to electricity does not release greenhouse gases and so does not contribute to global warming. Small amounts of greenhouse gases are released during the manufacturing and transportation of the wind turbines to their installation site. Do windmills cause global warming? A study published today […]
What causes a resistor to become non ohmic?
What causes a resistor to become non ohmic? As more current flows through a resistor, it generates more and more heat. This heat, when it becomes excessive, can cause the resistor to become non-Ohmic and the resistance would also increase. Even ordinary wires are also considered as Ohmic conductors. Are capacitors resistors? Capacitor vs Resistor […]
What is use of electromagnet Class 7?
What is use of electromagnet Class 7? An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire or coilthat create the magnetic field. What […]
Is Piano easier than guitar?
Is Piano easier than guitar? Granted, the piano does become tricky later on when you start to play rhythmically independent notes between different fingers and hands. With guitar, playing tends to get easier over time as students often grasp chords and learn several songs faster than a piano student might. Which instrument is hardest to […]
What does a steep line in a distance time graph show?
What does a steep line in a distance time graph show? A sloping line on a distance-time graph shows that the object is moving. The steeper the line (and the greater the gradient) the faster the object is moving. Calculate the speed of the object represented by the green line in the graph, from 0 […]