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A woman wearing high heels briefly supports all her weight on the heels.
If her mass is 45 kg and each heel has an area of 1.2 cm2, what pressure does she exert on the floor?
a rocket is launched at an angle 53 degree to the horizontal with a speed of 100 m/s. it moves along its initial line of motion with an acceleration of 30m/s for 3 seconds. at thi
Will an object spinning in zero gravity in vacuum continue spinning until an external force stops it?
two students walk in the same direction along a straight path at a constant speed one at .90m/s and another at 1.90m/s. assuming that they start at the same point and same time, ho
Proton was discovered by: (1)Chadwick (2)Thomson (3)Goldstein (4)Bohr Ans: (3)Goldstein
In the nucleus of 20 Ca 40 there are: (1) 40 protons and 20 electrons (2) 20 protons and 40 electrons (3) 20 protons and 20 neutrons (4) 20 protons and 40 neutrons
define electrostatistic
In plane transmission grating the width of the each slit is same to half of the opaque portion. Which order of spectra will be absent?
Instantaneous velocity and speed are explained at a certain instant and are shown by
What mechanical and electronic device has a name derived from a Czechoslovakian word meaning "work; compulsory service"? Ans: From a Czechoslovakian word meaning "work; com
Contact forces: types of forces that result when the two interacting objects are apparent to be physically linking each other. Ex: frictional forces, tensional forces, normal f
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