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Question1
Take two indistinguishable metallic tumblers A and B. Insulate one tumbler (Say A) by wrapping chart paper around it. Put tumbler B on the table and pour hot water (at about 70o) in it to fill about two-thirds with it. Utilize measuring cylinder for pouring hot water in B so that you know volume of water in the tumbler. Insert a thermometer in the hot water and hold it vertically. With the help of a watch take reading of thermometer initially (t = 0) and thereafter every 30 seconds. Keep on measurement for 10 minutes.
Record temperature of hot water against time and plot a graph between time and temperature.
Repeat the experiment with tumbler a pouring similar amount of water at the same initial temperature in it.
Evaluate the two cooling curves and draw your conclusions.
Suggest two improvements in the design of the experiment so that you may show the effect of thermal insulation on cooling more intensely.
An object-spring system moving with simple harmonic motion has an amplitude A, What is the total energy of the system in terms of k and A only
A particle is displaced in 0.92 s from point A to point B with a uniform speed of 4.8 m/s via a circular path of radius 3.8 m centered at the origin. Obtain the average acceleration of the particle
A paperweight, when weighed in air, has a weight of W = 16.1 N. When completely immersed in water, Find the volume of the paperweight
Eight identical, non-interacting particles are placed in a cubical box of sides L = 0.2 nm. Find the lowest energy of the system (in electron volts) and list the quantum numbers of all occupied states if (a) particles are electrons and (b) particles..
The space shuttle performs a retro burn for 3.5min to go from an orbital velocity of 17,500mph to re-entry velocity of 5000mph.
Nichrome wire of cross-sectional radius 0.791 mm is to be used in winding a heating coil. find the length of wire you must use to wind the coil
A field mouse trying to escape a hawk runs east for 6.0m , darts southeast for 3.9m, What is the magnitude of the net displacement of the mouse
Four identical charges (+2.2 ?C each) are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
A circuit contains two elements, CR. The current in this circuit when connected to a 2.15E2 V, 60.0 Hz source is 9.40 A and leads the voltage by 3.10E1 degrees. what is the power dissipated in this circuit
A spring with k = 30.0 N/m is at the base of a frictionless 30.0° inclined plane. how far up the incline does it travel before coming to rest
A -11.0kg bucket is lowered vertically by a rope in which there is 163N of tension at a given instant, What is the acceleration of the bucket
A crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates a curve in the flat road, how fast can the truck be moving without the crate sliding
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