Category: Physics

What are the two main types of calorimeter? Some of the most common types are adiabatic calorimeters, oxygen bomb calorimeters, and differential scanning calorimeters (DSC). An adiabatic calorimeter is used to measure a “runaway reaction”, any heat generated by the sample under test causes the sample to increase in temperature, fueling the reaction. How do […]

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 […]

How does electricity flow in a circuit draw an open circuit? The electric circuit in which there is a gap in the connections between the terminals of the cell, wires and the bulb, etc is called an open circuit (or incomplete circuit). Electricity does not flow through an open circuit because there is a gap […]

What happens when stomata are open? When stomata are open, water vapor and other gases, such as oxygen, are released into the atmosphere through them. A number of factors can affect the exchange of gases between a leaf and the atmosphere. What allows stomata to open and close? Specialized cells known as guard cells surround […]

Is it safe to run a dehumidifier constantly all the time? No, it is not necessary to run your dehumidifier all the time. You should only run your unit when the humidity level is above 50 percent. Collecting water constantly with a dehumidifier does really help you maintain the temperature and relative humidity at an […]

Is it bad to always park on a hill? Answer: Any time you park a car with an automatic transmission on a steep hill or incline, you are running a risk of transmission damage if you don’t exercise a lot of care. The problem can be avoided by setting your parking brake on steep hills […]

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 […]

What are chemical properties of steel? Alloy Steel Alloy steels (like carbon steels) contain both carbon and iron, but add additional elements such as silicon, nickel, chromium, manganese, or vanadium. The extra elements added are what provide the additional features and varied chemical properties compared to carbon steels. Is gold a metal? Gold (Au), chemical […]

Why hydrogen ion does not exist? Because the bare nucleus can readily combine with other particles (electrons, atoms, and molecules), the isolated hydrogen ion can exist only in a nearly particle-free space (high vacuum) and in the gaseous state. Why are H+ ions? Loss of an electron from H atom results in H+ . ion […]