Category: Physics

Why do clothes get wet? When light strikes any surface, some of it is reflected back into our eyes. But damp clothes have a thin layer of water on their surface (held in place by the material’s roughness), which leads to more of the reflected light rays being bent – ‘refracted’ – off-course. When a […]

Who was the first person to memorize the Holy Quran? Muhammad Who was Allah? In Islam, Allah is the unique, omnipotent and only deity and creator of the universe and is equivalent to God in other Abrahamic religions. According to Islamic belief, Allah is the most common word to represent God, and humble submission to […]

What is the formula for projectile motion? h = v 0 y 2 2 g . This equation defines the maximum height of a projectile above its launch position and it depends only on the vertical component of the initial velocity. A rock is thrown horizontally off a cliff 100.0 m high with a velocity […]

What is F MA Math? The famous formula is: F = ma. “Newton’s Second Law of Motion” (F is force, m is mass and a is acceleration) Do you need calculus for F MA? F=ma does not require any Calculus background. It is a test designed to challenge your understanding and intuitive on the most […]

Is the starter relay supposed to click? The starter relay not only completes the electrical circuit, but it also boosts the battery’s current. If your starter relay has gone bad, the electrical signal will never make it from the battery to the starter motor. A faulty relay often produces an audible clicking sound when you […]

What number of the month are we on? All months have 30 or 31 days, except for February which has 28 days (29 in a leap year). Every fourth year, the month of February has 29 days instead of 28. This year is called a “leap year” and the 29th day of February is a […]

Is the symbol for chlorine Cl or CI? Chlorine is a chemical element with symbol Cl and atomic number 17. Classified as a halogen, Chlorine is a gas at room temperature….Chlorine. Atomic Mass 35.45u Year Discovered 1774 What is the classification for chlorine? Chlorine is in group 17 of periodic table, also called the halogens, […]

What Hall voltage is produced by a 0 What is Hall effect and Hall voltage? The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor that is transverse to an electric current in the conductor and to an applied magnetic field perpendicular to the current. It was discovered […]

What is the correct order highest temperature on top for stellar classification? The seven main types are M, K, G, F, A, B and O. M stars are the coldest stars and O stars are the hottest. What is the main sequence stage? The main sequence is the stage where a star spends most of […]

What is the critical angle of ice? 49.8 degrees How do you find the critical angle in Snell’s law? The critical angle can be calculated from Snell’s law by setting the refraction angle equal to 90°. For any angle of incidence less than the critical angle, part of the incident light will be transmitted and […]