Category: Physics

How do you know if a road is 20 mph? There are no physical measures such as chicanes or humps in the roads that have been added to an original 20mph zone. Instead you’ll see road signs at the entry points into the 20mph zone, together with ’roundels’ or circles with ’20’ painted on the […]

What object is not found within our solar system? The sun, the planets, dwarf planets (Pluto), natural satellites (like the moon), asteroids, comets, meteoroids, meteors, and meteorites. Objects NOT found in our solar system: Galaxies, other stars, constellations, the universe, black holes, supernovas and nebulae. What is a coma in the solar system? The coma […]

How do you tell if an egg is boiled by spinning? Tip: Just place the egg on a hard surface, like the counter, and spin it like a top. As it’s spinning, grab it with your fingers ever-so-briefly and immediately let go. If it keeps spinning, it’s raw. If it stops dead, it’s boiled. How […]

Is rain water an acid or alkali? Not all rain can be considered pure water. Pure water is neither alkaline nor acidic. As rain falls from the atmosphere the impurities it collects changes the pH of the rain water, making it slightly acidic. How can we keep rain water clean? 5 Ways to Properly Store […]

What is cell surface charge? The surface charge can have either a negative or positive electrical state, which is determined by the balance between negatively charged and positively charged nanoparticles at the surface. The cell membrane surface of living cells has a different electric potential to the interior of cell, namely membrane potential. Are cells […]

Which statement best describes the effect that stress has on the immune system? Stress can lead to increased vulnerability to infections and immune deficiency disorders:best describes the effects that stress has on the immune system. Which of the following symptoms is considered a physical effect of stress? Chest pain is considered to be the physical […]

What are the similarities and differences between electric and magnetic forces acting on a charged particle? Electric forces are created by and act on, both moving and stationary charges; while magnetic forces are created by and act on only moving charges. Electric monopoles exist. Magnetic monopoles don’t* exist. This is the reason that Maxwell’s laws […]

What is the maximum torque that the loop can experience? Torque on the loop can be found using τ=NIABsinθ τ = N I A B sin ⁡ . Maximum torque occurs when θ = 90º and sin θ = 1. What is the magnetic dipole moment of current carrying coil? The magnetic dipole moment of […]

Which chord holds the most tension? Finally dominant chords are the sounds that are going to be most tense in any given key… That’s the reason the 2-5-1 progression sounds so nice and is so widely used. And the reason that the other posters said that the 5th or 7th are the most tense chords. […]

How many outlets can a 15 amp breaker hold? 10 outlets Why is daisy chaining dangerous? Daisy chaining is a term that refers to the practice of plugging a power strip into another power strip. This is dangerous because an excessive amount of power is being drawn from one single wall outlet, which means the […]