I don't really now a answer to the first one but this answer is for the second one: They provide a standardized system of classification for a language barrier.
Answer:
HELLO! I WILL EXPLAIN WHY GOLF BALLS HAVE DIMPLES.
Explanation:
DIMPLES ON A GOLF BALL CREATE A THIN BOUNDARY LAYER OF AIR THAT CLINGS TO THE BALL'S SURFACE. THIS ALLOWS THE AIR TO FOLLOW THE BALL'S SURFACE A LITTLE FARTHER AROUND THE BACKSIDE OF THE BALL, THEREBY DECREASING THE SIZE OF THE WAKE.
I AM SO SORRY ABOUT THE CAP LOCKS I THINK MY CAP LOCKS BUTTON IS PUSHED, AND IT IS NOT POPPING UP FOR SOME REASON.
ANYWAYS, HAVE A GREAT DAY!!!!!!
<span>If a negatively charged rod is brought near a neutral metal sphere, no attraction would happen since the neutral sphere has no available positive charges. So, the rod won't be attracted to the sphere. Hope this answers the question. Have a nice day.</span>
Answer:
I₂ = 25 W / m²
Explanation:
Intensity is defined as the relationship between power and area
I = P / A
the power emitted by the sun is constant
P = I A
for the two points of interest
I₁ A₁ = I₂ A₂
energy is distributed on the surface of a sphere
A = 4π R²
I₁ R₁² = I₂ R₂²
I₂ =
let's calculate
I₂ =
I₂ = 25 W / m²
Material 1 will be having the largest Young's modulus followed by Material 5, Material 3, Material 2 and Material 4.
Answer:
Option C.
Explanation:
Materials can be classified based on their elastic nature. Elasticity is the property of an object to return to its original state after deformation is removed. So the deformation can be occurred on that object due to the force or stress acting on that object.
As per Hooke's law, the stress acting on any object is directly proportional to the deformation or strain experienced by that object. And the constant of proportionality is termed as Young's modulus.
Young's modulus = Stress/Strain
So from the table, the young's modulus for all the materials are found as below.
Material 1 = Stress/Strain = 775/7.34E-06 = 106 ×
Material 2 = 900/1.86E-02=48400
Material 3 = 1200/2.55E-05 = 471×
Material 4 = 1500/3.95E-03=389×
Material 5 = 2500/2.53E-05=988×
So as per the given calculations, Material 1 will be having the largest Young's modulus followed by Material 5, Material 3, Material 2 and Material 4.