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Force in Two and Three Dimensions - Pressure and Fluids
Pressure is a force exerted over an area and is measured in Pascals (Pa).
P (in Pa) = Force (in newtons) / area (in m2) If a 750 N person were to accidentally step on your foot, would you rather they were wearing a flat soled sneaker or a narrow spike heel when they hit your foot? Obviously the sneaker because the force would be spread over a much larger area and the pressure at any point of your foot would be much less than if the force is concentrated on just a narrow heel. Example - If a person who weighs 750 Newtons makes contact with your foot on a heel which is 0.5 cm x 0.5 cm, what is the pressure exerted on your foot?
Mass energy relation - The total energy of a body is the sum of its kinetic energy and rest mass energy. Particle having rest mass zero always move with the velocity of light.
Q. Give any three properties of electric lines of force. Properties of lines of forces: (i) Lines of force begin from positive charge and terminate at negative charge. (ii
For the circuit shown in Figure, calculate the current flowing in the 50Ω load and the voltage drop across the load when (a) XS is 3/5 of XY (b) point S coincides with point
a yellow lamp emits light with a wavelength of 6.00E-7 meters. Calculate the frequency of the yellow light.
derive an expression for the total cross section for the scattering of light by a polorisable molecule in term of the incedent wave length.
a rocket is projected upwards with a velocity of 490. find te time taken to reach the ground
discuss the positive and negative of militancy
Kepler's 1-2-3 law Another formulation of Kepler's third law, that relates to the mass m of the primary to a secondary's angular velocity omega & semimajor axis a: m o= ome
A pendulum which is suspended from the ceiling of a railroad car is observed to hang at an angle of 10 degrees to the left of vertical. Which of the following answers could de
How noisy is an illuminator? It is very noisy, slightly so or completely silent, depending upon the power source and the construction. There heat dissipation is something which
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