The arrow should be drawn upwards but the magnitude of force (arrow representing air resistance) should be shorter than the arrow representing gravity
Answer:
θ = 14.45º = 0.252 rad
Explanation:
The expression that describes the phenomenon of diffraction is
a sin θ = m λ
Where a is the width of the exit opening in this case the width of the door, Lam is the wavelength, m the diffraction order for destructive interference,
Let's use the relationship between the speed of the wave is the producer of its frequency by the wavelength
v = λ f
λ = v / f
λ = 344/1220
λ = 0.282 m
sin θ = m λ / a
For the first destructive interference m = 1
sin θ = 1 0.282 /1.13
sin θ = 0.24956
θ = sin-1 (0.24956)
θ = 14.45º
We pass radians
θ = 14.45 (pi rad / 180º) = 0.252 rad
Using the formula t=root of 2h/g then where h=28 and g=9.8 then substitute so the answer is 2.4seconds
Explanation:
Given that,
Wavelength of light,
Angle,
We need to find the slit spacing for diffraction. For a diffraction, the first order principal maximum is given by :
n is 1 here
d is slit spacing
So, the slit spacing is .
Answer:
a-1 Graph is attached. The relation is linear.
a-2 The corresponding height for 68 kPa Pressure is 7.54 m
a-3 The corresponding weight for 68 kPa Pressure is 1394726kg
b The original height of the column is 5.98 m
Explanation:
Part a
a-1
The graph is attached with the solution. The relation is linear as indicated by the line.
a-2
By the equation
Here
- P is the pressure which is given as 68 kPa.
- ρ is the density of the oil whose SG is 0.92. It is calculated as
- g is the gravitational constant whose value is 9.8 m/s^2
- h is the height which is to be calculated
So the height of column is 7.54m
a-3
By the relation of volume and density
Here
- ρ is the density of the oil which is 920 kg/m^3
- V is the volume of cylinder with diameter 16m calculated as follows
Mass is given as
So the mass of oil leading to 68kPa is 1394726kg
Part b
Pressure variation is given as
Now corrected pressure is as
Finding the value of height for this corrected pressure as
The original height of column is 5.98m