a passenger elevator operates at an average of 8 m/s if the 60th floor is 219 m above the first floor how long does it take the
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Answer:
No. of moles, n = 25.022 moles
Given:
Volume of gas in tank, V = 29.1 l
Temperate of gas, T = = 273 + 35.8 = 308.8 K
Pressure of gas, P = 21.8 atm
Solution:
Making use of the ideal gas equation which given as:
PV = nRT
where
R = Rydberg's constant = 0.0821 L-atm/mol-K
Re-arranging the above formula for 'n' and putting the values in the above formula:
n = 25.022
Answer:
705.6 N
Explanation:
The object is hanging on the rope, so there are two forces acting on the object:
- The force of gravity, downward, equal to
W = mg
where m is the mass of the object and g the acceleration of gravity
- The tension in the rope, T, upward
Since the object is hanging motionless, the object is in equilibrium, so we can write:
And therefore
For this problem,
m = 72 kg
Substituting,