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Direction of Acceleration and Velocity
Knowing the size of a distance or speed is frequently meaningful for creating comparisons. For example, for some reasons it may be enough to know which Inverness is further from London than it is from Birmingham. Therefore, in several everyday situations it is not sufficient to know the speed or distance.
how do higher energy levels in our xray beam affect the photoelectric effect
Derivation
Kirchhoff's law of radiation (G.R. Kirchhoff): The emissivity of a body is equivalent to its absorptance at the simialr temperature. Kirchhoff's laws (G.R. Kirchhoff)
Concept: You are moving into an apartment and take the elevator to the 6th floor. Does the force exerted on you by the elevator do positive or negative work when the elevator (a)go
Voltage: Voltage is the electrical equivalent of mechanical potential. If a person drops a rock from the first storey of a building, the velocity it will reach when dropped wi
Production of electricity : Very large amounts of electrical energy lie dormant in the atoms of every speck of material in the universe. Whilst the atoms remain electrically ba
Two concentric conducting shells a and b are of radii R and 2R. A charge +q is centred at their center. Shell b is then earthed and a is given charge q. Find the charge on outer su
The mass of a mol of proton and electron is: (1) 6.023x 10 23 g (2) 1.008g and 0.55mg (3) 9.1x 10 -28 kg (4) 2gm Ans: (2) 1.008g and 0.55mg
Who first theoretically predicted the existence of the positron, a positively charged electron? He received the Nobel Prize in Physics in 1933. Ans: (Paul Adrien M
A machine performs 8 Joules of work in 2 seconds. How much power is delivered by this machine? Ans: The power is delivered by this machine is 4 watts.
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