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A body of mass 2 kg thrown vertically upwards with a velocity 40 m/s comes to instantaneous rest at a height 50 m. Is there any other force (other than gravitational force), if yes then calculate the value. Ans) Yes , a force due to air drag will be there , to calculate this wehave to first find work done by air drag..Acc. To work-energy theoremWgravity + Wair drag = change in K.E.-Mgh +Wair drag = change in K.E.Wair drag =change in K.E. +mgh=[0-1/2mu2] +mgh = -1/2 x 2 x (40)2 + 2x 10 x 50 = -1600+1000 = -600Jnow w.d. = F x sF= -600/50 = -12N
Shockley, Brattain and Bardeen won a Nobel Prize for what small invention? Ans: Shockley, Bardeen and Brattain won a Nobel Prize for small invention of transistor.
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
1 Farad: One farad is described as the capacity of that capacitor which keeps a charge of 1 coulumb, if the potential difference among the plates is one volt. It's equation
The Bubble''s shape is spherical so as to reduce the surface tension. With the given volume of liquid,Spherical surface only fits i minimizing the surface tension to a greater exte
Classical free electron theory: The free electron theory of metals using classical laws was developed by Dude and Lorentz in the beginning of last century. That time the va
Cathode rays are made up of: (1) Positively charged particles (2) Negatively charged particles (3) Neutral particles (4) None of these Ans: (2)Negatively charged pa
Students are required to prepare a one page mini-poster explanation of an application of Physics in a Technological, Biomedical, Biological or Engineering context. It is essential
composition of two SHM at right angle to each other and having time period in the ratio of 1: 2
1 Coulumb Charges: 1 coulumb charge is that amount of charge which when placed 1 m from an identical charge in vacuum which repels it with a force of 8.99 × 109 N.
How many types of fibers end are there? Basically there are two types of fibers end are: adhesive encapsulated and state of the art fused, though some manufactures dispense alo
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