Answer:
Explanation:
Given
length of wire 
change in length 
mass of wire 
Young's modulus for silver 
load on wire 
change in length is given by
Where A=area of cross-section
also wire is the shape of cylinder so cross-section is given by
The 2nd Law of Motion states acceleration is produced when a n unbalanced force acts on an object (mass) The more mass the object has the more net force has to be used to move it.
Examples:
If you use the same force to push a truck and push a car, the car will have more acceleration than the truck, because the car has less mass.
It's easier to push a empty shopping cart then a full one, because the full one has more mass than the empty one. This means more force is required to push the full shopping cart.
Answer:
Explanation:
ASSUMING that the cab has ONLY kinetic energy,
(it's not sitting over a loaded spring, high on a hill, on fire)
KE = ½mv²
v = √(2KE/m)
v = √(2(18750)/2100) = √17.85714...
v = 4.225771...
v = 4.23 m/s or about 15.2 km/hr
Answer:
The the angle between the axis of polarization of the light and the transmission axis of the analyzer is 52⁰.
Explanation:
Given;
I₀ as incident light intensity
The intensity of a linearly polarized light passing through a polarizer is given by Malus' law:
I = I₀Cos²θ
where;
I is the intensity after passing through the analyzer
θ is the the angle between the axis of polarization of the light and the transmission axis of the analyzer.
If 38% of the total intensity is transmitted, then I = 38% of I₀ = 0.38I₀
0.38I₀ = I₀Cos²θ
0.38 = Cos²θ
Cosθ = √0.38
Cosθ = 0.6164
θ = Cos⁻¹ (0.6164)
θ = 51.95° = 52⁰
Therefore, the angle between the axis of polarization of the light and the transmission axis of the analyzer to allow 38% of the total intensity to be transmitted is 52⁰.
Answer: B) the President to veto a bill passed by Congress
Explanation: The principle of Checks and balances in government may be explained as an idea of power segmentation which allows each arm of a democratic government including the executive, the legislative and the judiciary to have a certain amount of power and control over policies, laws and reforms of a country. This idea is especially useful in checking the excesses of a certain arm of government and ensures that other arms are able to come in when a certain arm of government step beyond it's bounds.
The president could veto a bill passed by Congress, because, bills are made and passed by the legislative or congress, however, the executive arm has the power to enforce or veto the bills.
