Given:
9 astronauts
volumetric flow rate of air = 20 L / min
mass of Lithium hydroxide = 27000 g
4% exhaled air
Density of air = 0.0010 g/mL
Solution:
20 L / min (0.0010 g / mL ) (1000 mL / 1 L) = 20.0 g of air / min of each astronaut
<span>Total mass flow rate of air = 9 * 20.0 g / min = 180.0 g of air / min </span>
<span>Mass of CO2 produced = 180 g / min ( 0.04 ) = 7.2 g CO2 / min
</span>The chemical reaction would be expressed as:
<span>CO2 + 2 LiOH = Li2CO3 + H2O </span>
<span>moles LiOH = 27000 g of LiOH / 23.95 g / mol
</span>moles LiOH = 1127.35 moles
<span>Dividing the number of moles of LiOH by 2 from the relation in the reaction would allow us to get the number of moles of CO2 that reacts. Then, multiply the resulting value by 44.01 g/mol to get the mass of CO2.
</span>
1127.35 mol LiOH ( 1 mol CO2 / 2 mol LiOH ) ( 44.01 g / mol ) = 24807.31 g CO2
<span>Then, divide the mass of CO2 that reacts by the mass flow rate of CO2 which is 0.56 g CO2 per minute,
24807.31 g / 0.56 g /min = 44298.76 minutes</span>
Answer:
The three laws of motion were first compiled by Isaac Newton in his Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687.
Explanation:
Answer:
k =
b =
t =
Solution:
As per the question:
Mass of the block, m = 1000 kg
Height, h = 10 m
Equilibrium position, x = 0.2 m
Now,
The velocity when the mass falls from a height of 10 m is given by the third eqn of motion:
where
u = initial velocity = 0
g = 10
Thus
Force on the mass is given by:
F = mg =
Also, we know that the spring force is given by:
F = - kx
Thus
Now, to find the damping constant b, we know that:
F = - bv
Now,
Time required for the platform to get settled to 1 mm or 0.001 m is given by:
Answer:
A: In all cases, the acceleration was the same.
Explanation:
I know this because its a clear obvious answer not only that it was one of my USA TESTPREP questions and it was right.
All you mainly have to do is the math - F=ma , In each case , the acceleration is 5 m/s squared
Light takes 162.1 seconds to travel from Venus to earth.
Explanation:
Speed of light=3 x 10⁸ m/s
distance between Venus and earth =30,220,000 miles=48634375680 m
Now the distance is given by d= v t
d= distance
v= velocity
t= time
48634375680= 3 x 10⁸ t
t=162.1 s