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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?
Q. (a) A giant refracting telescope at an observatory has an objective lens of focal length 15m. If an eyepiece of focal length 1.0 cm is used, what is the angular magnification o
An elevator is stopped at the ground floor. It starts moving upwards at constant acceleration a>0 for 5 seconds. It then keeps a constant speed for 35 seconds. Finally, it slows do
Regard as an electron and a proton at an instant in time to be at a separation of 5 cm from each other. Presume the pair to be totally isolated from its surroundings in the vacuum
A child's toy train moves at a constant speed of 2.0 cm/s. a. Illustrate the position-time graph showing the position of the toy for 1.0 min. b. What is the slope of the lin
Why does sun appear flat during sunrise and sunset? The sun rays have to travel by a larger atmospheric distance. Most of the blue light and shorter wave lengths are removed by
A rectangular surface (0.14 m x 0.39 m) is oriented in a uniform electric field of 440 N/C. What is the maximum possible electric flux through the surface?
what is viscosity?
State and illustrate Lenz's law with examples Derive a mathematical expression for a force between two parallel conductors carrying a current.
The position-time graph for a hot-air balloon that is in flight is shown in the accompanying figure. a) What is the average velocity of the balloon? b) What is the
Determine the refractive index of a pair of media provided critical angle as 40°. Determine the angle of deviation generated by a thin prism of refracting angle 5° and refractiv
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