Category: Physics

What year will the sun explode? In about 5.5 billion years the Sun will run out of hydrogen and begin expanding as it burns helium. It will swap from being a yellow giant to a red giant, expanding beyond the orbit of Mars and vaporizing Earth—including the atoms that make-up you. Is Sun getting weaker? […]

What is the degree of freedom at critical point? In the critical point the difference of density between the liquid phase and the vapour phase is so small the are indistinguishable, hence considered as single phase. So according the gibbs phase rule (. F=C – P +2) the degree of freedom should be 2. What […]

Do waves transfer mass? Waves transfer energy but not mass. What waves transfer matter as they travel? Mechanical waves Can sound waves travel where there is no matter? Sound cannot travel through a vacuum. A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter […]

How does Leaning Tower of Pisa not fall? In the end, the Leaning Tower of Pisa does not fall because its center of gravity has been carefully kept within its base. The Leaning Tower doesn’t fall because its center of gravity is carefully kept within its base. How did Galileo discover free fall? Galileo conducted […]

How is a nucleus formed? The vesicles first fuse to form membranes around individual chromosomes, which then fuse with each other to form a complete single nucleus. What is the nucleus covered by? nuclear membrane Why nucleus is the most important organelle? The Nucleus contains the genetic material, also known as DNA, which is responsible […]

How do you find the mass of a disc? Mass of a Thin Disk m=2πR∫0rρ(r)dr. How do you find the density of a rod? The density can be found with the formula, density equals mass over volume (d = m/v): The mass is given m = 540 grams, you can plug that into the formula […]

Where we use A and an? Use “a” before words that start with a consonant sound and “an” before words that start with a vowel sound. Other letters can also be pronounced either way. Just remember it is the sound that governs whether you use “a” or “an,” not the actual first letter of the […]

Can magnetic fields interact with each other? When two magnets are brought close together, their magnetic fields interact. You can see how they interact in the Figure below. The lines of force of north and south poles attract each other whereas those of two north poles repel each other. When electric and magnetic fields both […]

What is the application of sound? While we cannot hear ultrasonic waves, we apply them in various technologies such as sonar systems, sonograms, surgical tools, and cleaning sytems. Some animals also use ultrasonic waves in a specialized technique called echolocation that alows them to pinpoint objects and other animals, even in the dark. What are […]

What are the 3 blood vessels? An adult’s would be closer to 100,000 miles long. There are three kinds of blood vessels: arteries, veins, and capillaries. Each of these plays a very specific role in the circulation process. Arteries carry oxygenated blood away from the heart. How many blood vessels are attached to the heart? […]