Examiners: F Acheampong & Elmela Date: 30th October, 2015
Pwo7
TA/SBBS 109/15 /B
Index Number:..
4. At what Celsius temperature will the Kelvin scale doubles the Celsius
reading? (2 marks)
5. A body of mass 20 kg falling freely attains a velocity of 9.5 m/s at height of
2.3 m above the ground. Calculate the total energy at that height. (g = 10 m/s)
(3 marks)​

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.)

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.