Ques. the frequencies of sounds produced from two
different sources in medium p are 340hz and 400 hz
and the difference of their wavelengths is 0.165 m. in
another medium q the velocity of sound is 400ms.
[r. b.-2017]
a. what is called contact force?
b. explain the relation between the velocity of
sound with the nature of medium.
c. find out the velocity of sound in medium? 3
d. if the difference of wavelength of same sound in
both media is 0.1m, then will the wave travel the
distance 124 m in medium q by 80 complete
vibrations? give opinion through mathematical
analysis.
akaration na 6

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water