- 14 A Tank Is Filled With Water To A Height Yi 3 5 M The Tank Has A Small Hole In One Of Its Walls At A Height Y2 1 1 (54.1 KiB) Viewed 30 times
14. A tank is filled with water to a height yı = 3.5 m. The tank has a small hole in one of its walls at a height y2 = 1.5 m, see figure below. y P. Vio yi h=yı- y2 P. y2 V2 (5) (a) What is the speed v2 of the water emerging from the hole? (b) How long does it take the water to strike the floor at x? (5) (c) What is the horizontal distance x from the base of the tank to the point at which the water stream strikes the floor? [5] 15. An aluminium flagpole is 33 m high. By how much does its length increase as the temperature increases by 15 °C? You may use QAL = 23x10°C, the coefficient of linear expansion for aluminium [51 16. A small electric immersion heater is used to heat 100g of water for a cup of instant coffee. The heater is labeled 200 W (It converts electrical energy to thermal energy at this rate). Calculate the time required to bring all this water from 23.0°C to 100 °C, ignoring any heat loss 151 17. Calculate the minimum amount of energy, in joules, required to completely melt 130g of silver, initially at 15.0°C. [51