Answer:
16.68 L
Explanation:
First of all, we need to calculate the number of moles corresponding to 25.2 g of CO2.
The molar mass of CO2 is 44.01 g/mol, therefore the number of moles is:
So now we can use the ideal gas equation:
where:
p = 0.84 atm is the gas pressure
V = ? is the volume
n = 0.573 mol is the number of moles
R = 0.08206 L atm / K mol is the gas constant
T = 25°c = 298 K is the gas temperature
Substituting into the equation and re-arranging it, we find the volume:
Answer:
h= 161.06 m
Explanation:
Given that
Speed of the sound ,C= 343 m/s
Total time ,t= 6.2 s
lets take the depth of the well = h
The time taken by stone before striking the water = t₁
we know that
The time taken by sound =t₂
The total time
t = t₁+ t₂
Now by solving the above equation we get
h= 161.06 m
Therefore the depth of the well will be 161.06 m.
Answer:
(a). The initial velocity is 28.58m/s
(b). The speed when touching the ground is 33.3m/s.
Explanation:
The equations governing the position of the projectile are
where is the initial velocity.
(a).
When the projectile hits the 50m mark, ; therefore,
solving for we get:
Thus, the projectile must hit the 50m mark in 1.75s, and this condition demands from equation (1) that
which gives
(b).
The horizontal velocity remains unchanged just before the projectile touches the ground because gravity acts only along the vertical direction; therefore,
the vertical component of the velocity is
which gives a speed of