Category: Physics

How much HF is lethal? Hydrofluoric acid is one of the strongest acids known that has a strong lipophilic ability. Ingestions of more than 20 mg/kg body weight are considered a lethal dose. Even after dermal exposure, the fatal prognosis is caused by severe electrolyte disturbances, especially hypocalcemia. What does an HF burn feel like? […]

What is the force of the earth on the moon? Sun, Earth, and Moon Gravitational body causing tidal force Tidal force Body Mass (m) Moon 7.34×1022 kg 1.10×10−6 m⋅s−2 Earth 5.97×1024 kg 2.44×10−5 m⋅s−2 m is mass; r is radius; d is distance; 2r is the diameter G is the gravitational constant = 6.674×10−11 m3⋅kg−1⋅s−2 […]

How much force does it take to move a railcar? First, a force of 2 to 5 pounds per ton of train weight is required to move on straight level track. At very slow yard speeds only 2 to 3 pounds is needed while increasing to about 5 pounds at higher speeds. This force is […]

What is the maximum displacement in SHM? Maximum displacement is the amplitude A. The angular frequency ω , period T, and frequency f of a simple harmonic oscillator are given by ω=√km ω = k m , T=2π√mk,andf=12π√km T = 2 π m k , and f = 1 2 π k m , where […]

Which Jovian planets have rings? All Jovian planets have rings: Jupiter: faint, dusty rings. Saturn: bright, spectacular rings. Uranus: dark, thin rings. Neptune: dark, thin rings & ring arcs. How does Jupiter generates its internal heat? Internal Heat The jovian planets get their heat from the Sun and from their interiors. Jupiter creates a lot […]

What is the Bergeron process in simple terms? The process by which precipitation is initiated in a mixed cloud with a temperature below freezing. Because the equilibrium vapour pressure of water vapour with respect to ice is less than that with respect to liquid water, ice crystals grow at the expense of supercooled water droplets. […]

How do you read contour intervals? How To Read Contour Lines Index lines are the thickest contour lines and are usually labeled with a number at one point along the line. Intermediate lines are the thinner, more common, lines between the index lines. Supplementary lines appear as dotted lines, indicating flatter terrain. What is another […]

Will a 220v bulb work on 120V? No, unless you want to have one quick flash. However, you can use a 220/240 watt bulb in North America. It will shine only half as brightly though. Will a 240V bulb work with 110v? The bulb will either not work, produce a very dim light, or work […]

What is the derivative of x? The derivative of a function y = f(x) of a variable x is a measure of the rate at which the value y of the function changes with respect to the change of the variable x. What does f ‘( x mean? The expression “f (x)” means “a formula, […]

What is the thermoelectric power? The conversion of thermal energy into electrical energy. Thermoelectric generation relies on a fuel source (e.g. fossil, nuclear, biomass, geothermal, or solar) to heat a fluid to drive a turbine. What is thermoelectric diagram? Thermo-electric Diagram. A diagram indicating the change in potential difference for a fixed difference of temperature […]