Ratio of resistances of two bulbs = 2:3
Both are connected in series.
We have to find the ratio of powers in the bulbs..
We know that, current flow through each conductor in series connection remains same. So, we have to use that formula of power which shows relation between current and resistance.
For series connection; P ∝ R
→ P₁/P₂ = R₁/R₂
→ P₁/P₂ = 2/3
→ P₁ : P₂ = 2 : 3
The water molecules would slow down, and as they slow down, the heat created from their movement would cease.
Answer:
30 miliAmps
Explanation:
Step 1:
Obtaining an expression to solve the question. This is illustrated below:
From ohm's law,
V = IR
Were:
V is the voltage.
I is the current.
R is resistance.
From the question given, we were told that the resistance is constant. Therefore the above equation can be written as shown below:
V = IR
V/I = constant
V1/I1 = V2/I2
V1 is initial voltage.
V2 final voltage.
I1 is initial current.
I2 final current.
Step 2:
Data obtained from the question. This include the following:
Initial voltage (V1) = V
Initial current (I1) = 60 miliAmps
Final voltage (V2) = one-half of the original voltage = 1/2V = V/2
Final current (I2) =..?
Step 3:
Determination of the new current. This can be obtained as follow:
V1/I1 = V2/I2
V/60 = (V/2) / I2
Cross multiply to express in linear form
V x I2 = V/2 x 60
V x I2 = V x 30
Divide both side by V
I2 = (V x 30)/V
I2 = 30mA.
Therefore, the new current is 30miliAmps
Answer:
resolve shear stress = 22 MPa
Explanation:
Given data
slip plane α = 43.1°
slip directions β = 47.9°
shear stress = 20.7 MPa (3,000 psi)
applied stress =45 mPa (6,500 psi)
to find out
what stress will be necessary
solution
we know that
resolve shear stress = aplied stress × cosα × cosβ
resolve shear stress = 45 × cos(43.1) × cos(47.9)
resolve shear stress = 22 MPa
we can say that here single cristal will be yield
because resolve shear stress is bigger than critical shear stress
