Category: Physics

How fast do planes fly in mph? The typical cruising airspeed for a long-distance commercial passenger aircraft is approximately 880–926 km/h (475–500 kn; 547–575 mph). Was the mosquito faster than the Spitfire? During its trials on 16 January 1941, W4050 outpaced a Spitfire at 6,000 ft (1,800 m). The original estimates were that as the […]

Will 5kg dumbbells build muscle? and for building mass you need to lift heavy weighted dumbbell with lower rep range (10–15 counts). By lifting 5 kg for 30 count sure is difficult but it does not build the mass… it shapes the muscle and makes the biceps ripped and burns fat. so doing that is […]

Why is a database a tertiary source? Indexes, bibliographies, concordances, and databases may not provide much textual information, but as aggregates of primary and secondary sources, they are often considered tertiary sources. However, they may also provide access to the full text or content of primary and secondary sources. What are some examples of tertiary […]

What is a muscle moment arm? The moment arm of a muscle force is defined by the perpendicular distance between the muscle’s line of action and the instantaneous centre of rotation of the joint in which it spans, and represents the capacity of that muscle to exert a joint torque (Pandy, 1999). Does a longer […]

What is the resistance seen across terminals A and B? 5 ohms What is the formula to find equivalent resistance? The equivalent resistance of a 4-Ω and 12-Ω resistor placed in parallel can be determined using the usual formula for equivalent resistance of parallel branches: 1 / Req = 1 / R1 + 1 / […]

Who can beat Dark Phoenix? 3 Odin. Odin’s sword alone could destroy the universe as we know it. So, of course, he could beat the Phoenix in a fight. Literally a god, Odin makes enormous mistakes but does tend to rule much more benevolently and with a better head on his shoulders than the raw […]

What is the first step in any design process? Discovery is the first step of the design process, where teams work together to develop an understanding of the problem they are trying to solve, and define the path they will take to explore solutions. It culminates in the communication of a vision – a concise […]

Which installation is not covered by the NEC? The NEC does not cover electrical installations in ships, water- craft, railway rolling stock, aircraft, or automotive vehicles. What is the purpose of the NEC? The NEC (the National Fire Protection Association’s NFPA 70) is a widely-adopted model code for the installation of electrical components and systems. […]

Why do we use resistors? A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. What causes resistors to burn? Blowing Up a […]

What are 3 examples of invasive species? Notable examples of invasive plant species include the kudzu vine, Andean pampas grass, English ivy, Japanese knotweed, and yellow starthistle. Animal examples include the New Zealand mud snail, feral pig, European rabbit, grey squirrel, domestic cat, carp, and ferret. What are two human activities that could contribute to […]