Answer:
The reflectivity at the boundary of the two grains is 
×
Step-by-step explanation:
Given :
Refractive index of one grains (
) = 1.553
Refractive index of second grains (
) = 1.544
According to the fresnel equation,
∴ general equation of refraction ( reflectivity ) 
where 
= incident angle, 
= transmitted angle
but for normal incidence 
°
so our equation become,
⇒ 
×
Therefor reflectivity at the boundary is given by ×.
Answer:
A) 2cm
Step-by-step explanation:
According to the Triangle Inequality Theorem, the sum of the measure of any two sides of a triangle MUST be larger than the measure of the third side. In this case, with sides 3cm and 5cm, the third side would have to be at least 3cm in order for the smallest two sides to be larger than the third side:
3cm + 3cm = 6 cm > 5cm
However, if the third side was only 2cm, then the two smaller sides would be 5cm, which is only equal to and not larger than the third side:
3cm + 2cm = 5cm
Any other measurements larger than 3cm, when added to the given side of 3cm, would be larger than 5cm and would form a triangle. So, the only measure that would NOT form a triangle would be 2cm.
-2/3 :)))))))))))))))))))))))))
which sequences are arithmetic? check all that apply. –8.6, –5.0, –1.4, 2.2, 5.8, … 2, –2.2, 2.42, –2.662, 2.9282, … 5, 1, –3, –
sergiy2304 [10]
In an arithmetic sequence, the next term is found by adding a constant term to each number to arrive at the next number. The common difference can be found by subtracting the first term from the second term.
-8.6, -5.0, -1.4, 2.2, 5.8....the common difference here is 3.6
-8.6 + 3.6 = -5.0
-5.0 + 3.6 = -1.4
1.4 + 3.6 = 2.2
2.2 + 3.6 = 5.8
so this IS an arithmetic sequence.
2,-2.2, 2.42, -2.662, 2.9282...there is no common difference..so this is not an arithmetic sequence
5,1,-3,-7,-11....common difference is -4
5 + (-4) = 1
1 + (-4) = -3
-3 + (-4) = -7
-7 + (-4) = -11
this IS an arithmetic sequence
-3,3,9,15,21...common difference is 6
-3 + 6 = 3
3 + 6 = 9
9 + 6 = 15
15 + 6 = 21
this IS an arithmetic sequence
-6.2, -3.1, -1.55, -0.775, -0.3875...this is not an arithmetic sequence
Answer:
37.5 square units
Step-by-step explanation:
A=a+b/2h => 5 + 10 / 2 x 5
