Answer:
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Answer:
817.5 Pa
Explanation:
From Bernoulli's equation, considering thst there is no height difference then
P1+½d(v1)²=P2+½d(v2)²
P1-P2=½d(v2²-v1²)
∆P=½d(v2²-v1²)
Where P represent pressure, d is density and v is velocity. Subscripts 1 and 2 represent inside and outside. ∆P is tge change in pressure
Given the speed at roof top as 128 km/h, we convert it to m/s as follows
128*1000/3600=35.555555555555=35.56 m/s
Velocity at the bottom of roof is 0 m/s
Density is given as 1.293 kg/m³
∆P=½*1.293*(35.56²-0)=817.5 Pa
Answer:
Ideal mechanical advantage of the lever is 3.
Explanation:
Given that,
The distance between the levers input force and the fulcrum is 8 cm, 
The distance between the fulcrum and the output force is 24 cm, 
To find,
The ideal mechanical advantage of the lever.
Solution,
The ratio of the distance between the fulcrum and the output force to the distance between the levers input force and the fulcrum is called the ideal mechanical advantage of the lever. It is given by :
m = 3
So, the ideal mechanical advantage of the lever is 3.
The combined
gas law does not account for changes in power. The combined gas law has no official founder; it is simply
the incorporation of the three laws that was discovered. The combined gas law
is a gas law that combines Gay-Lussac’s Law, Boyle’s Law and Charle’s Law. Boyle’s law states that pressure is inversely
proportional with volume at constant temperature. Charle’s law states that
volume is directly proportional with temperature at constant pressure. And
Gay-Lussac’s law shows that pressure is directly proportional with temperature
at constant volume. The combination of these laws known now as combined gas law
gives the ratio between the product of pressure-volume and the temperature of
the system is constant. Which gives PV/T=k(constant). When comparing a
substance under different conditions, the combined gas law becomes P1V1/T1 =
P2V2/T2.
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