How do I know if my glasses are plastic or glass? All you need to do is tap a lens against your teeth, a tool that’s always available. If the lenses make a soft ringing sound, they are more likely to be glass. If they make a soft *thunk*, then they are definitely plastic. Do […]
Why are the mirror fitted on the outside of cars convex?
How do you identify uranium?
How do you identify uranium? Uranium is a silvery-gray metallic weakly radioactive chemical element. It has the chemical symbol U and atomic number 92. The most common isotopes in natural uranium are 238U (99.27%) and 235U (0.72%). What is the most common use for uranium? A radioactive, silvery metal. Uranium is a very important element […]
How many whooping cranes are left today?
How many whooping cranes are left today? We appreciate your contribution to the recovery of the Whooping Crane Eastern Migratory Population. This report is produced by the International Crane Foundation. The current estimated population size is 80 (39 F, 38 M, 3 U). Seventeen of these 80 individuals are wild-hatched and the rest are captive-reared. […]
When an electric current operates a buzzer makes a sound?
When an electric current operates a buzzer makes a sound? Explanation: When a buzzer is attached to a certain circuit and we press the key then the circuit gets complete. As a result, the current will start to flow from the batter or cell and moves towards the buzzer. Thus, buzzer produces sound due to […]
Why does an apple look green?
Why does an apple look green? Green apples appear green because of chlorophyll in the peel. In red apples, the colour of chlorophyll is masked by the presence of anthocyanins, which are red in colour. Interestingly, anthocyanins accumulate in vacuoles, while the chlorophylls are present in chloroplasts of apple peel cells. Why is the color […]
What increases effective population size?
What increases effective population size? One of the things that can influence the effective population size is the sex ratio of the breeding animals. We can estimate Ne using information from a population census or pedigree database about the numbers of males (Nm) and females (Nf) that produce offspring in a generation. How does population […]
Why does the sky turn pink at sunset?
Is milk a Newtonian fluid?
Is milk a Newtonian fluid? Newtonian fluids are those having a constant viscosity dependent on temperature but independent of the applied shear rate. Low-concentration liquids in general, such as whole milk and skim milk, may for practical purposes be characterized as Newtonian fluids. Is honey a non Newtonian? Honey is an example of a non-Newtonian […]
What products increase friction?
What products increase friction? There are two methods of increasing friction: one is by making the surfaces rough and the other by increasing the mass of the object that is moving. For example, the tyres of vehicles have treads (these are the ‘designs’ that you can see on the tyre surface), which increase the friction […]