How much should be the minimum size of the ordinary mirror,
so that and observer standing at the centre of room is able
to see the whole of the height of the wall behind him ?
An ice-box is built of wood 1.75 cm thick, lined with cork
3 cm thick. If in the steady state the temperature of the
inner surface of the cork is 0 ºC and that of the outer
surface of wood is 12 ºC, what is the temperature of the
wood-cork interface? The thermal conductivities of wood and
cork are 0.2 W/m-K and 0.04 W/m-K respectively
i need the working and properties of the sextent and all
the objects and much more about sextent..
52
What is the meaning of ‘steady state’ in the context of
transmission of heat?
56
I just want to convert the voltage into current i.e.
suppose I have 750V & 1A AC power then I want to convert it
into 12V & 62A DC power only difficulty is that I don't
want to use the tranceformer. Simply to say, I want to make
the step-down without using tranceformer. Please, give me
some ideas.
And also I want the relation between Magnetic Induction &
Weight of the body can be levitated. Or I can say, how much
of magnetic induction requires to lift 500gms weight?
I am heartily thankful to you.
71
while climbing a hill we bend forward. give a scientific
reason for the same
the question from which area of physics in ONGC Written
examination in physics can we expect more?
73
I want to prepare a frequency generator. the specifications
i.e. output requirements are 12V, 1-10A & frequency upto 1K
to 5K. Please, inform me with proper circuit dig. & the
component values.
61
Mercury thermometer is constructed as shown in Figure
The capillary tube has a diameter of 0.004 cm, and the bulb
has a diameter of 0.250 cm.
neglecting the expansion of the glass, find the change in
height of the mercury column
that occurs with a temperature change of 30.0 °C.
73
the force of attraction of earth on a man, who is inside
the artificial satellite, is Zero
state whether the above statement is correct, if not
correct please give the correct answer
115
what is the difference between opticalzoom,dizitalzoom and
smartzoom
60
what is mariners compass
56
How to prepare for the post State bank of india clerk
personal interview ?
124
WHY IS MAGNETIC NEEDLE POINTD?
47
when does one exert greater pressure on ground during
walking or standing? why ?
what happends to the period of a simple pendulum taken into
a deep mine
65
while climbing a hill or mountain we bend forward.
give a scientific expalantion in a simple way
64
What is the avarege speed of people fencing like at the
olympic games. (sorry for the misspelled words)
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