What causes a boundary layer? Aerodynamic forces are generated between the fluid and the object. This creates a thin layer of fluid near the surface in which the velocity changes from zero at the surface to the free stream value away from the surface. Engineers call this layer the boundary layer because it occurs on […]
Can electricity meters be wrong?
Can electricity meters be wrong? If the meter starts to move very quickly, the appliance could be faulty. If the meter is still moving, it’s probably faulty. You should contact your supplier to investigate the problem with your meter. They can arrange for it to be tested. How do I know if my electricity meter […]
What is the slipperiest substance known to man?
What is the slipperiest substance known to man? Tufoil® Is there a material that nothing sticks to? A new artificial material appropriately named SLIPS is one of the most slippery materials ever created. The new material, developed at Harvard, is self-cleaning and never gets dirty for a simple reason: nothing can stick to it. Why […]
Do voltages add in parallel?
Do voltages add in parallel? Ideal voltage sources can be connected together in both parallel or series the same as for any circuit element. Series voltages add together while parallel voltages have the same value. Note that unequal ideal voltage sources cannot be connected directly together in parallel. How do you find voltage in series […]
What are the five stressors?
What are the five stressors? Terms in this set (5) Biological stressors. Mental or physical illness, disability, injury, and chemical imbalances. Environmental stressors. Poverty, pollution, crowding, noise, or natural disasters. Cognitive or thinking stressors. Personal behavior stressors. Life situations. What are 3 physical symptoms of stress? What happens to the body during stress? Physical symptoms […]
What is the maximum allowable Factory charge of refrigerant?
What is the maximum allowable Factory charge of refrigerant? 15 pounds Which condition requires accessing both the high and low side of the system for refrigerant recovery when using the system dependent passive recovery process? using the system dependent (passive) recovery process, which condition requires accessing both the high and low side of the system […]
How do you change the properties of a mixture?
How do you change the properties of a mixture? Mixtures can be separated through physical changes, including techniques such as chromatography, distillation, evaporation, and filtration. Physical changes do not alter the nature of the substance, they simply alter the form. Pure substances, such as compounds, can be separated through chemical changes. Do mixtures have varying […]
What type of reaction is calcium oxide and carbon dioxide?
What type of reaction is calcium oxide and carbon dioxide? Calcium oxide is a white crystalline solid with a melting point of 2572̊C. It is manufactured by heating limestone, coral, sea shells, or chalk, which are mainly CaCO3, to drive off carbon dioxide. This reaction is reversible; calcium oxide will react with carbon dioxide to […]
Can two female eggs mix?
Can two female eggs mix? BOSTON — Fertility clinics have put a new twist on how to make babies: A “two-mom” approach that lets female same-sex couples share the biological role. One woman’s eggs are mixed in a lab dish with donor sperm, then implanted in the other woman, who carries the pregnancy. Can I […]
What is a classical turning point?
What is a classical turning point? The classical turning point is that value of the x-coordinate at which the potential energy is equal to the total energy, and therefore classically the system must reverse its direction of motion. Is a harmonic oscillator a good model for HCl? As Figure 5.3. 2 demonstrates, the harmonic oscillator […]