Category: Physics

How do you force acceleration times? Newton’s second law of motion is F = ma, or force is equal to mass times acceleration. Learn how to use the formula to calculate acceleration. Created by Sal Khan. What are the 3 forms of acceleration? In physics, the three types of acceleration are changes in speed, direction […]

Does electricity flow through the wire around the core? An electromagnet is made by sending electric current through an insulated wire wrapped around the iron core. How does the number of winds or wire around a core affect the strength of the magnetism? Electricity gets in more, because the more winds equals more magnetism. Which […]

What is electrical energy and its formula? The energy consumed by an electric circuit to flow current through it is referred as electrical energy. This energy is provided by the battery to every electric charge. The work required to keep the charge Q in motion by the battery of voltage V is. W=VQ. What is […]

What speed is 4000 rpm? 80 mph = 4000 RPM. How do you measure driveshaft speed? To check for critical speed, calculate this equation: Top speed x 336 (a constant) x rear ratio (like 4.10), then divide it by the tire height (28” tall tire). Here is an example: Top speed is 160mph x 336 […]

What are the 2 types of machines? There are basically six types of machine: The inclined plane. – used for raising a load by means of a smaller applied force. The lever. – involves a load, a fulcrum and an applied force. The pulley. – In simplest form it changes the direction of a force […]

Is the angle of incidence is 30 What is the value of the angle of reflection? The angle between the mirror and the incident ray is 30 degrees. The sum of the angle of incidence and this angle (30) makes a right angle. So, the angle of incidence is 90 – 30 = 60 degrees. […]

What is the difference between radiation and heat transfer by radiation? Convection is the transfer of energy by movement of a medium, whereas radiation is the transfer of energy by, well, thermal radiation. Conduction also requires a medium, but, again, it is a fundamentally different mechanism than either convection or radiation; in this case it […]

Why do stars twinkle class10? Answer. The change in intensity of light coming from the stars is called twinkling of stars. The twinkling of stars occurs due to atmospheric refraction of star’s light. Hence, the star light reaching our eyes change continuously and stars appear to twinkle. Why do stars twinkle marks? Stars twinkle because […]

Why are river basins important to humans? Why Basins Are Important Basins are vital to human existence, since they provide clean water for drinking; water for growing food; and water to nourish plant life, which provides the oxygen people breathe. What is the difference between river basin and water divide? A river basin collects water […]

How do wind turbines work when it not windy? If there is too little wind and the blades are moving too slowly, the wind turbine no longer produces electricity. The turbine starts to create power at what is known as the cut-in speed. Power output continues to grow as the wind speed increases, but at […]