Category: Physics

How much energy is stored in spring? if you stretch a spring with k = 2, with a force of 4N, the extension will be 2m. the work done by us here is 4×2=8J. in other words, the energy transferred to the spring is 8J. but, the stored energy in the spring equals 1/2x2x2^2=4J (which […]

Is mass quantized? As far as we know, mass is not quantized in either of these ways… mostly. For instance, only a small part of the mass of the proton comes from the masses of its quarks. Most of the proton’s mass is actually the kinetic energy of the quarks and gluons. Why is water […]

What happens in the story Le Morte d Arthur? Le Morte d’Arthur tells the story of King Arthur and his Knights at the Round Table. Although the war requires several battles, Arthur and his knights win and return to Guinevere and the other wives. Soon after, Launcelot establishes himself as the greatest knight in all […]

What is the drag coefficient of a f1 car? Typical Formula 1 car drag coefficients are between 0.7 and 1.1, depending on the circuit the car is set up for. ! A lot of this drag is due to the wings but a lot of it is due to the uncovered wheels. What car has […]

What is the critical angle of glass? about 42° What are the factors that influence refractive index? The two factors which affect the value of the refractive index are: Temperature. Refractive index values are usually determined at standard temperature. Wavelength of light. The refractive index varies with wavelength linearly because different wavelengths interfere to different […]

How do you know if planes are perpendicular? Planes are either parallel, or they’re perpendicular, otherwise they intersect each other at some other angle. parallel if the ratio equality is true. perpendicular if the dot product of their normal vectors is 0. Do lines have to meet to be perpendicular? Parallel lines never intersect. Perpendicular […]

What is peak wave? The peak wave period (in seconds) is defined as the wave period associated with the most energetic waves in the total wave spectrum at a specific point. Wave regimes that are dominated by wind waves tend to have smaller peak wave periods, and regimes that are dominated by swell tend to […]

How can we protect cliffs from erosion? Sea walls. Concrete walls that are placed at the foot of a cliff to prevent erosion. They are curved to reflect the energy back into the sea. How can we protect our coastal areas? 15 Ways to Help Protect the Ocean and Coasts, Regardless of Where You Live […]

What will happen if two electric bulbs of 25W and 100W? Answer : No,25 W` bulb will fuse. From this , it is clear that voltage across the 100W bulb (=88V) is lesser than specified (220V), while across the 25Wbb̲(=352V) is greater than specified (220V), so the 25W bulb will fuse. Which bulb will glow […]

What is the format to write an activity? Some write-ups (especially when published in certain journals or newsletters or books) include an introductory narrative about the activity, often citing relevant literature related to what it tries to accomplish or giving more details about the goals of the activity. How do you prepare an activity? Activity/Lesson […]