Category: Physics

Are cameras more accurate than mirrors? A mirror image is called a mirror image because it reverses things from left to right. You usually see a mirror image of yourself. In contrast, if you look at a normal camera photo, you see yourself as another person would see you. Mirrors are much more accurate than […]

How is the first day of winter decided? In the United States and the rest of the northern hemisphere, the first day of the winter season is the day of the year when the Sun is farthest south (on December 21st or 22nd). This day is known as the Winter Solstice. The declination of the […]

What affects the EMF of an electrochemical cell? Electrochemical cells are different from normal reactions; however the amount of volts produced by the cell will be effected by the factors that affect chemical reaction rates. The main factors that affect chemical reactions are Temperature, Surface area and Concentration. How do you calculate cell EMF? Sample […]

Why is US East Coast colder than West? Land has a lower heat capacity than oceans, and it also heats and cools faster than oceans. During the winter, land is much colder than the oceans. When the westerly winds blow over it, the air cools substantially. Thus, the East Coast experiences extreme cold weather during […]

How many watts is a 10 hp motor? 7680 watts How many watt is 1kVA? 900 watts What is the difference kVA and kW? The primary difference between kW (kilowatt) and kVA (kilovolt-ampere) is the power factor. kW is the unit of real power and kVA is a unit of apparent power (or real power […]

How do you find weight with distance and work? Work is the force exerted on an object times the distance over which the force is exerted: W = Fx, where W is the work in Nm = Joule. Work done to lift an object of mass m a height h: W = Fgh = mgh. […]

What is the principle of vibrational spectroscopy? When a sample is eradiated to a beam of incident radiation, it absorbs energy at frequencies characteristic to that of the frequency of the vibration of chemical bonds present in the molecules. This absorption of energy by vibrating chemical bond results in an Infrared spectrum. What is the […]

What are 3 factors that affect the gravity at a specific location? Gravitational Factors of Our Eight Planets Two major factors, mass and distance, affect the strength of gravitational force on an object. What factors affect Centre of gravity? Factors affecting Stability: Relationship of line of gravity to base of support. The height of then […]

What is the smallest electric charge that can be put on an object? Elementary charge ( e) Smallest possible unit of charge. Equal to the charge on one proton or the magnitude of charge on one electron, which is 1.6 × 1 0 − 19 C 1.6 \times 10^{-19}\,\text C 1. Which charge is possible? […]

What is the difference between a seamount and an island? When the tops of the volcanoes appear above the water, an island is formed. While the volcano is still beneath the ocean surface, it is called a seamount. What does a seamount become when it breaks through the surface of the ocean? If a seamount […]