Category: Physics

Can material exist in all the three states? 2 Answers. Every element can exist in the 3 basic states: gas, liquid, solid. It is just a matter of enough freezing and high pressure (to solidify gases, even Helium) or enough heat and low pressure (to vaporize metals, even tungsten). Does all fire have smoke? As […]

Are sparklers thermite? The sticks of the sparklers are coated with a pyrotechnic composition known as ‘Thermite’, which is responsible to act as a fuel in the burning process. So yes, sparklers are thermite-positive. Thermite is basically a metal powder, which burns along with the oxidizer in the sparklers, to burn brightly. Why do sparklers […]

How are cactus adapted to survive in a desert? A cactus is able to survive in the desert due to the following features: (i) It has long roots that go deep inside the soil for absorbing water. (ii) Its leaves are in the form of spines to prevent water loss through transpiration. (iii) Its stem […]

How do you know if valves are good? Testing for Leaky Valves Attach the rubber hose of a vacuum gauge to the intake manifold. Turn the engine on and have an assistant gradually depress the accelerator pedal to increase the speed of the engine. Observe the needle of the vacuum gauge. If the needle reads […]

What is the momentum of a 100 kg football player? Q: A football player has a mass of 100kg and is running 10m/s. What is his momentum? A: 100kg x 10m/s= 1000kg⋅m/s Page 8 Practice 1 1. Read this article on momentum. What is the velocity of an object that has a mass of 2.5 […]

Who is the best mountain biker in the world? The 25 Greatest Riders of the Decade Rachel Atherton. 37 World Cup DH Wins. 25 World Cup DH Podium Finishes. Greg Minnaar. 12 World Cup DH Wins. Aaron Gwin. 20 World Cup DH Wins. Tracy Moseley. 5 World Cup DH Wins. Nino Schurter. 40 World Cup […]

Why would an atom become an ion? Ions are formed when the number of protons in an atom does not equal the number of electrons. If more protons are present, the ion is positive and is known as a cation; if more electrons are present, the ion is negative and referred to as an anion. […]

Which material is used for Sonometer wire? Sonometer wire is made of soft iron for better results. What is the principle of Sonometer? A Sonometer is a device based on the principle of Resonance. It is used to verify the laws of vibration of stretched string and also to determine the frequency of a tuning […]

What do half-life mean exponential problems? Half-Life. We now turn to exponential decay. One of the common terms associated with exponential decay, as stated above, is half-life, the length of time it takes an exponentially decaying quantity to decrease to half its original amount. What are the different parts of an exponential function? There are […]

Is time and mass related? There isn’t any relation between time and mass in speical relativity: mass is a Lorentz invariant, the same in all reference frames, time is the fourth component of the position 4-vector. What is mass and time? Any mechanical quantity can be expressed in terms of three fundamental quantities, mass, length […]