Category: Physics

Is humidity hot or cold? Humidity is the presence of water molecules in the air. High humidity levels are more likely in warm air, because it can hold more water at higher temperatures. If the air in your home is warm, it will also have the capacity to hold a lot of moisture. What is […]

What is the relationship between temperature and height in the thermosphere? The Thermosphere and Ionosphere The thermosphere lies above the mesopause, and is a region in which temperatures again increase with height. This temperature increase is caused by the absorption of energetic ultraviolet and X-Ray radiation from the sun. Is the thermosphere the hottest layer? […]

What is C in a ray diagram? The important point on the object to draw rays from is the top, as the image of the bottom of the object now must lie on the principal axis. There are two important points marked on the diagram. C represents the centre of curvature of the mirror, and […]

What happens if an atom is not electrically neutral? Atoms which are not electrically neutral are called ions. One can collect electric charge by transferring electrons. Materials with an excess of electrons are negatively charged. Those with a deficiency of electrons are positively charged. What if there is no electron? You would become plasma as […]

What type of fuel can be substituted for an aircraft if the recommended octane is not available? What type fuel can be substituted for an aircraft if the recommended octane is not available? A) The next lower octane aviation gas. B) Unleaded automotive gas of the same octane rating….2.3.2.4.5.A.1. 2.3.2.4.5.A.1 PAR PRG PRH RPA RPG […]

How do you calculate watts? AC three phase amps to watts calculation formula P(W) = √3 × PF × I(A) × VL-L(V) So watts are equal to square root of 3 times power factor PF times amps times volts: watt = √3 × PF × amp × volt. or. W = √3 × PF × […]

How do you calculate cfm of air flow? To calculate Air Flow in Cubic Feet per Minute (CFM), determine the Flow Velocity in feet per minute, then multiply this figure by the Duct Cross Sectional Area. What are the different methods used for measuring air flow? The most common and easiest way to measure or […]

Why do atoms get bigger across a period? 4 Answers. As you move from left to right across a period, the number of protons in the nucleus increases. These lower energy levels shield the valence electrons from the attractive effects of the atom’s nucleus, so the atomic radius gets larger. Why do atoms get smaller […]

How fast can a freight train accelerate? The final factor and one frequently overlooked is the tractive effort required for acceleration of the train. It takes about 10 pounds per ton to accelerate to a speed of 6 miles per hour in one minute or 12 miles per hour in two minutes, a reasonable rate […]

Do air bubbles get bigger? The bubble gets bigger when it go up to the surface because there is less pressure as it rises to the surface. Air is less dense than water and thus the force of gravity is less on the bubble than on the surrounding water then the bubbles rise. What happens […]