Answer:
0.1 nm
Explanation:
Potential difference of the electron = 150 V
Mass of electron
Charge on electron
Plank's constant
If the velocity of the electron is v
Then according to energy conservation
According to De Broglie
Answer:
A) approximate alkalinity = 123.361 mg/l
B) exact alkalinity = 124.708 mg/l
Explanation:
Given data :
A) determine approximate alkalinity first
Bicarbonate ion = 120 mg/l
carbonate ion = 15 mg/l
Approximate alkalinity = ( carbonate ion ) * 50/30 + ( bicarbonate ion ) * 50/61
= 15 * (50/30) + 120*( 50/61 ) = 123.361 mg/l as CaCO3
B) calculate the exact alkalinity of the water if the pH = 9.43
pH + pOH = 14
9.43 + pOH = 14. therefore pOH = 14 - 9.43 = 4.57
[OH^- ] = 10^-4.57 = 2.692*10^-5 moles/l
[ OH^- ] = 2.692*10^-5 * 179/mole * 10^3 mg/g = 0.458 mg/l
[ H^+ ] = 10^-9.43 * 1 * 10^3 = 3.7154 * 10^-7 mg/l
therefore the exact alkalinity can be calculated as
= ( approximate alkalinity ) + ( [ OH^- ] * 50/17 ) - ( [ H^+ ] * 50/1 )
= 123.361 + ( 0.458 * 50/17 ) - ( 3.7154 * 10^-7 * 50/1 )
= 124.708 mg/l
Answer:
tensile stress at yield = 254 MPa
ultimate stress = 477 MPa
average stress = 892 MPa
Explanation:
Given data in question
bar yields load = 80 kN
load maximum = 150 kN
load fail = 70 kN
diameter of steel (D) = 20 mm i.e. = 0.020 m
diameter of breaking point (d) = 10 mm i.e. 0.010 m
to find out
tensile stress at the yield point , ultimate tensile stress and average stress at the breaking point
solution
in 1st part we calculate tensile stress at the yield point by this formula
tensile stress at yield = yield load / area
tensile stress at yield = 80 ×10³ / /4 × D²
tensile stress at yield = 80 ×10³ / /4 × 0.020²
tensile stress at yield = 254 MPa
in 2nd part we calculate ultimate stress by given formula
ultimate stress = maximum load / area
ultimate stress = 150 ×10³ / /4 × 0.020²
ultimate stress = 477 MPa
In 3rd part we calculate average stress at breaking point by given formula
average stress = load fail / area
average stress = 70 ×10³ / /4 × d²
average stress = 70 ×10³ / /4 × 0.010²
average stress = 892 MPa
Answer:288 pm
Explanation:
Number of atoms(s) for face centered unit cell -
Lattice points: at corners and face centers of unit cell.
For face centered cubic (FCC), z=4.
- whereas
For an FCC lattices √2a =4r =2d
Therefore d = a/√2a = 408pm/√2a= 288pm
I think with this step by step procedure the, the answer was clearly stated.
Answer:
Given:
operating temperature of heat engine,
Solution:
For a reversible cycle, maximum efficiency, is given by:
Now, on re designing collector, maximum temperature, changes to
, so, the new maximum efficiency,
is given by:
b) sketch vc and ic.
Answer:
hello your question is incomplete attached is the complete question
A) Vc = 15 ( 1 - ) , ic =
B) attached is the relevant sketch
Explanation:
applying Thevenin's theorem to find the mathematical expression for the transient behavior of Vc and ic after closing the switch
= 8 k ohms || 24 k ohms = 6 k ohms
=
= 15 v
t = RC = (10 k ohms( 15 uF) = 0.15 s
Also; Vc =
hence Vc = 15 ( 1 - )
ic = =
=
attached
Answer:
(c)- Elastic modulus
Explanation:
We know that in tensile test we measure the properties of the material like yield strength,ultimate tensile strength ,Poisson ratio.
In tensile test
σ = ε E
Where σ is the stress
ε is the strain.
E is the elastic modulus.
Now for shear tress
τ = Φ G
Where τ the shear stress
Φ is the shear strain.
G is the shear modulus.
So we can say that Shear modulus is analogous to Elastic modulus.