Category: Physics

How do photographers use strobes? You simply punch two numbers into the light meter that you set your camera for (shutter speed and ISO). Then you ‘fire’ your strobe light while holding the light meter in front of your subject. The light meter will display an aperture number. What light is used to reduce shadows? […]

Why can you safely hold your bare hand in a 200 ◦ C oven for a few seconds? The air that immediately exits the oven as you open it indeed has 200°C. But cannot be in contact with your hand for more than a few moments since it raises quickly. This is way to short […]

Which software is used for Sankey diagram? STAN is a software for substance flow analysis, developed by inka software for the University of Technology of Vienna, Austria. It has a feature for displaying flows in their network diagrams as Sankey arrows. How do I read a Sankey chart? Sankey diagrams show the flow of resources. […]

What are five adaptations of plants? Plants have evolved several adaptations to life on land, including embryo retention, a cuticle, stomata, and vascular tissue. What is an example of a behavioral adaptation in plants? Behavioural adaptations in plants Plant roots which grow downwards may be because of gravity or growing directly towards water to maximise […]

Is CL more electronegative than C? Check out boron: it’s less electronegative than hydrogen [2.0 vs. 2.2]….Carbon is More Electronegative Than You Think. Element Electronegativity (Pauling) F 4.0 [3.98] O 3.4 [3.44] Cl 3.2 [3.16] N 3.0 [3.04] Who is more electronegative N or CL? Nitrogen is more electronegative than Chlorine. FON- Fluorine Oxygen Nitrogen […]

What is the Centre of pressure on an aerofoil? Center of Pressure The center of pressure is the point where the total sum of a pressure field acts on a body. In aerospace, this is the point on the airfoil (or wing) where the resultant vector (of lift and drag) acts. What happens to the […]

What is the correct order of development? (A) Correct sequence in development is Fertilization → Zygote → Cleavage → Morula → Blastula → Gastrula. What are the five stages of man’s development? The key components of Erikson’s model of human development include stage one, infancy, trust versus mistrust; stage two, toddlerhood, autonomy versus shame and […]

Can you hear a plane at 20 000 feet? Yes, depending on the type of plane, which would determine how loud it is and what the frequency of its sound output was, in normal cruising flight. How far can you hear a jet? Aircraft noise is also affected by humidity, air density and cloud cover. […]

What are the two main reasons air pressure changes? Although the changes are usually too slow to observe directly, air pressure is almost always changing. This change in pressure is caused by changes in air density, and air density is related to temperature. What are the two factors influencing the movement of air or wind? […]

What are 3 negative factors that affect mental wellness? Unemployment, redundancy, loss of a business, large investment losses or other financial loss can have a negative impact on your mental health. How does social factors affect mental health? Summary. Most aspects of mental illness and psychological well‐being are influenced by social factors (such as gender, […]