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1. Calculation on the energy

Total surface of 4 walls and roof = (144 + 135) m^2 = 279 m^2 Heat loss by conduction = (1/2) x 279 x (25 - 10...

2. toolbox

...2).(95/g)v^2 + 79.2 where v is the speed of the toolbox at the edge of the roof , and g is the acceleration due to gravity, taken to be 10 m/s^2 hence...

3. Physics---density and pressure

...the pressure to be reduced accordingly and hence avoiding damage to the roof . b) Weight of 850N is uniformly carried by the bottom...

4. High or low conductance??

... Ice-Cream container (polystyrene) An oven glove (nylon) Roof Insulation (polythene) Use high conductance materials for...

5. S1 Maths

... temperature = 285-355 = -70(degree) 2. A boy standing one the roof of his school building of height 34 meters threw a...

6. 家租住頂樓, 業主把天台租出電訊公司做發射站

...non-ionizing radiation, they could not penetrate the concrete slab on your roof . The phone signals that you receive when you stay at home is due...

7. Compare Hong Kong against US situation...(In English)

... this concept could be incorporated into the facades, roofs and shading devices of buildings. Two grid-...

8. projectile

...40)t + 13 = 0 t = 2.38 or 1.09 We take t = 2.38 for it to land on the roof . So horizontal displacement = 27 cos 40 x 2.38 = 49.2 m (2) Velocity...

9. Does wood have liquid state?

..., wood will still be found as a supporting material (notably in roof construction) or exterior decoration. Wood to be used for construction work...

10. kinematics (urgent)

...v =? v = [-10.213 + (-9.81) x 1] m/s = -20.023 m/s For the journey from the roof to ground, use equation: v^2 = u^2 + 2a.s with v = -20.023 m/s, u = 0 m...

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