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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
Your company's cost of capital is 12%. You are currently evaluating three projects that have the following cash flow streams: a. Find the payback period, discounted paybac
If either screen or source or both are at preset distance from the diffracting device (obstacle or aperture), the diffraction is known as Fresnel type.
Electrons and holes in semi-counductor Metals have free electrons available in conduction band for conduction of electric current. As the valence band overlaps the conduction b
A 50 newton light fixture is supported by two guy wires as shown. Determine the tension in each wire
Determine the change in entropy, in joules, when 5 moles of an ideal gas expands from a value of 4 lits. to 40 lits. at 27°C. (R = 8.314 JK -1 mol -1 )
refractive index of the transparent liquids using prism and spectrometer
Non- Linear circuit It can be described as that circuit whose parameters change with voltage or current.
What is Crystal twinning Crystal twinning occurs when two divide crystals share some of the same crystal lattice points in a symmetrical manner. The result is an intergrowth of
how Michelson interferometer can be used to measure the wavelength of sodium light.
explain briefly about piezoelectric effect to produce ultrasonics
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