Category: Physics

Which is the basic unit of matter? In turn, the atom is the fundamental unit of matter…, that is, of an element. The number of positively charged protons and neutral neutrons in an atomic nucleus account for most of the mass of an atom. Each negatively charged electron that orbits a nucleus is about 1/2000th […]

Who is credited with creating the first periodic table? British chemist John Newlands was the first to arrange the elements into a periodic table with increasing order of atomic masses. He found that every eight elements had similar properties and called this the law of octaves. How did Moseley establish more accurate periodic table? by […]

What is the formula of center of mass? The center of mass can be calculated by taking the masses you are trying to find the center of mass between and multiplying them by their positions. Then, you add these together and divide that by the sum of all the individual masses. What is the Centre […]

How many electrons does a 60 watt light bulb pass per second? As Incandescent lamp is a resistive load , Current that will flow through bulb is 0.5 Amp. By definition 1 Amp is equal to one coulomb of charge per second. Charge of an individual electron 1.602 × 10^-19 coulombs. Hence 1 coulomb of […]

How do you measure moisture in the air? The amount of water vapor in the air can vary greatly on regional scales and must be measured at weather stations. There are several ways to measure and express this moisture content. One is using a psychrometer, which measures the dry bulb (actual air) temperature and what […]

How do emotions affect financial decisions? When your anger is at its peak, you’re more likely to make rash financial decisions. You can even compare this to angry casino players on a losing streak. In their anger and frustration, they lose even more money in a bid to recover what they’ve gambled away. What emotions […]

How many lengths does a car have? Figure one car length for every ten miles an hour,” Barndt said. “So if you’re doing 55 miles an hour you should have six car lengths between you so that if something happens to the car in front of you, you have time to stop or react.” The […]

Can a body have zero velocity and still acceleration give example? Yes, a body with a velocity 0 can still accelerate. The simplest example is a body which is thrown up. At the peak point its velocity becomes 0 but still accelerates due to gravity. How can you have acceleration but no velocity? Since acceleration […]

Why Hall voltage is negative? In metals, the Hall voltages are generally negative, indicating that the electric current is composed of moving negative charges, or electrons. What is the value of Hall coefficient? The average value of the Hall coefficient was measured to be 0.0113±0.0002m3C−1 and sign of the Hall coefficient was positive corresponding to […]

What is it called when the server misses the serve in tennis? Singles – a tennis game played by two players. Second Service – the second serve that the server is allowed after missing the first serve. This serve must be successful or the server will lose the point (called a double fault). What is […]