The formula is:
W = p * ΔV, where W stays for work, p stays for the pressure and ΔV is the change of volume in the piston.
We know that : W = 0.6 J.
The piston has a diameter: 1.8 cm. It means that : r = 0.9 cm.
It travels 2.3 cm, so the height of a cylinder is: h = 2.3 cm.
ΔV = r² · π · h = 0.9² · 3.14 · 2.3 = 5.85 cm³ = 0.00000585 m³
The pressure:
p = W / V = 0.6 J / 0.00000585 m³ = 103,448.27 Pa
p = 103.45 kPa
Answer: The pressure of the steam is 103.45 kPa.
The average velocity can be calculated using the formula:
v = d / t
For the 1st car, the velocity is calculated
as:
v1 = 8.60 m / 1.80 s = 4.78 m / s
While that of the 2nd car is:
v2 = 8.60 m / 1.66 s = 5.18 m / s
Now we can solve for the acceleration using the formula:
v2^2 = v1^2 + 2 a d
Rewriting in terms of a:
a = (v2^2 – v1^2) / 2 d
a = (5.18^2 – 4.78^2) / (2 * 8.6)
a = 0.23 m/s
Therefore the train has a constant acceleration of about
0.23 meters per second.
A. Earth crust shakes
Sudden movements in the fault line, ex: San Andreas fault line, can cause sudden earthquakes,
Electric and magnetic field vectors are perpindicalar to each other in a electromagnetic wave. Passing stay current through a straight conductor shows some magnetic flux.
