squaring a wall

Mark is going to buy wallpaper for his bedroom wall, whose area is 30 square yards. How many square feet of wallpaper is needed to cover the wall? => 90 square feet or 270 square feet or 180 square feet or 27 square fee..

Question: Read the following extract and answer the questions that follow: I am not cruel, only truthful.... Most of the time I mediate on the opposite wall. i) How is the mirror not cruel, but truthful? ii) Explain "The eye of a little god, four-cornered" iii) How does the mirr..

Sabine's Formula - Prof. Wallace C. Sabine (1868 - 1919) of Harvard University investigated architectural acoustics scientifically, particularly with reference to reverberation time. He deduced experimentally, that the reverberation time is: directly proportional to the volume of the hall inversely..

All gases are made up of large number of minute particles called molecules. Large distances separate the molecules so that the actual volume of the molecules is negligible as compared to the total volume of the gas. The molecules are in a state of constant rapid motion in all directions, co..

The persistence of audible sound even after the source has ceased emitting sound is called reverberation. If the reverberation of a sound pulse persists so long as to prolong the sound while several successive pulses are produced, the intelligibility will suffer, leading to poor acoustic conditio..

Consider an ideal gas enclosed in a cubical vessel of edge L. Take a corner of the vessel as the origin O and the X-,Y-, Z- axes along the edges (figure 1). Let A 1 and A 2 be the parallel faces, perpendicular to the X-axis. Consider amolecule moving with velocity . The components of t..

Quantity Derivation of the Quantity SI Unit Symbol Area Length square m 2 Volume Length cube m 3 Density Mass per unit volume kg m -3 Speed Distance travelled per unit time m S -1 Acceleration Speed change p..

>Most stimulated emission photons initially produced in the discharge tube will not happen to be parallel to the tube axis. These will be quickly stopped at the walls. Stimulated emission photons that are parallel to the axis, can move back and forth through the discharge tube many times ..