Agricultural Education — Examination Papers, 1881. Ixxix 
5. A particle moving from rest has its velocity uniformly acceler- 
ated ; in half-a-minute from the beginning of the motion it describes 
a distance of 1500 yards ; what is the numerical value of the 
acceleration ? If the mass of the particle is 10 lbs., what is the 
numerical value of the force producing the acceleration, and what 
ratio does that force bear to the force of gravity in London (<; = 32'2) 
on 3 lb. of matter ? 
6. Define specific gravity, and describe any one method of finding 
the specific gravity of a liquid. 
A glass ball weighs 7050 grains ; it weights 4500 grains in water ; 
and it weighs 4704 grains in a certain liquid : what is the specific 
gravity of the liquid ? 
7. Explain the action of the common syphon. 
Everything else being the same, why should the velocity of the 
out-flow be greater, the greater the length of the longer leg? 
8. Explain briefly the formation of hoar-frost, and particularly why 
it should often happen that it is formed on a grass-plot and not on a 
neighbouring gravel walk. 
9. Explain the use of the fly-wheel of a steam-engine. 
If the mass of a fly-wheel is 12 tons and is supposed to be uniformly 
distributed along the circumference of a circle 10 ft. in radius, and 
if the wheel makes 20 revolutions a minute, what is the numerical 
value of its kinetic energy, and how many foot-pounds of work would 
it do against a resistance before it was brought to rest ? 
EXAMINATION IN MENSUEATION AND SUEVEYING. 
Maximum Numbek of Marks, 100. Pass Numbee, 50. 
Tlmrsday, May 12th, from 2 p.m. till 5 p.m. 
1. What is a rod of brickwork ? A wall a brick thick stands on 
footings four bricks deep, the first two courses being 2 bricks thick, 
the next two brick thick : the height of the wall above the foot- 
ings is 10 feet ; assuming that a brick laid in mortar is 3 inches deep, 
how many rods of brickwork are there in 100 feet of the length of 
the wall ? 
2. How many tons of clay(sp. gr. 2) are required to cover an acre 
on an average depth of a quarter of an inch ? 
3. The pitch of a hipped roof is 2 vertical to 3 horizontal ; it 
measiu'es at the eaves 50 ft. by 30 ft. ; how many ridge tiles 18 in. 
long are required to cover the hips and ridge ? 
4. A cylindrical bushel measure is 9 in. high, what is the area — 
measured internally — of the sides and of the base ? (A gallon may 
be taken as 277^ cub. in.) 
