Category: Physics

Are hydrogen or electric cars better? Hydrogen fuel cell vehicles tend to be more frugal than their battery electric counterparts. According to Autocar, the Hyundai Nexo comes with a real-world range of 414 miles and filling up takes just five minutes, whereas electric charging can be an hour-long affair at the best of times. Is […]

Is human eye better than camera? Most current digital cameras have 5-20 megapixels, which is often cited as falling far short of our own visual system. This is based on the fact that at 20/20 vision, the human eye is able to resolve the equivalent of a 52 megapixel camera (assuming a 60° angle of […]

Which of the following relations is correct for permeability? The correct relation between magnetic susceptibility and relative permeability is- 1 x = Ur-1 2 x = 4r + 1 3 x = u + 1 4 x = u – 1. What is relationship between μ and ɸ *? There is an inverse relationship between […]

How do you find the buoyant force of a balloon? Buoyant Force of Balloons The formula for buoyant force is: (B) = ρ V g. ρ = Density of Fluid (We used density of the air because the balloons were afloat, not submerged) V = Displaced Volume. g = 9.8 (gravity) Density of air(ρ)= 1.225 […]

Which do you think is more important for child development nature or nurture Why? Nature is more important than nurture because genes determine who we are. Although our environment influences us, genes determine how it affects us. For this reason, nature is more important than nurture. Which has more impact nature or nurture? (PhysOrg.com) — […]

What is the difference between structural and ball and stick model? A molecular formula uses chemical symbols and subscripts to indicate the exact numbers of different atoms in a molecule or compound. A structural formula indicates the bonding arrangement of the atoms in the molecule. Ball-and-stick and space-filling models show the geometric arrangement of atoms […]

Why did Germany not invade Sweden? Hitler did not invade Sweden because he did not want to waste valuable troops in Scandinavia when he had other concerns. The Swedes proved their neutrality by not letting Germany use Swedish airspace: when the Germans flew over Sweden to attack Norway, the Swedes fired back with anti-aircraft guns. […]

How long does it take for salt to dissolve in hot water? 2 minute Does salt melt in water? Water lowers the melting point of salt when it dissolves in it just as salt does for water! What happens when you mix salt and water? When salt is mixed with water, the salt dissolves because […]

What do numbers symbolize on the speedometer? it shows is the distance your bike has covered. If the right number is in a white dial, it means that it shows the meters in 100s covered. So, if it shows 22595 with 5 being in the white dial, that means the distance covered is 2259 km […]

What is produced when aluminum reacts with hydrochloric acid? Aluminum metal reacts with hydrochloric acid to form hydrogen gas and an aluminum chloride solution. In this investigation, you will predict the mass of hydrogen gas produced by a given amount of reactants, then measure the amount, and compare them. Hydrochloric acid is an aqueous solution […]