Formula for radius of curvature approaches to infinity

Plantation agriculture is a type of commercial farming in which a single crop is grown for the entire year. This type of farming requires large amount of labour and capital. The crop production may be further processed on the farm itself where it is grown or in nearby factories or small scale industries.

Answer:

Threshold frequency is 1.2 × 10^15 Hz.

Explanation:

Threshold frequency can be calculated by using the formula,

threshold frequency = work function (in joule)/ planks constant.

So, here change 5ev into joule by multiplying with 1.6 ×10^-19J which will give 8×10^-19J(approx)

and use planks constant, h= 6.6 ×10^-34J (approx)

Put in the above formula and then.. you got your answer.

Answer:

The threshold frequency for the metal is 1.21×10¹⁵Hz.

Explanation:

The threshold frequency is defined as the minimum frequency of the incident radiation below which the photoelectric emission is not possible completely. It is given as,

[tex]\nu_o=\frac{E_o}{h}[/tex]          (1)

Where,

ν₀=thereshold frequency

E₀=work function in joules

h=planks constant=6.6×10⁻³⁴ m²kg s⁻¹

The values given in the question are,

[tex]E_o=5\times 1.6\times 10^-^1^9=8\times 10^-^1^9J[/tex]    (2)

By placing the value of E₀ and h in equation (1) we get;

[tex]\nu_o=\frac{8\times 10^-^1^9}{6.6\times 10^-^3^4}=1.21\times 10^1^5 Hz[/tex]

Hence, the threshold frequency for the metal is 1.21×10¹⁵Hz.

Answer:

(A)12

Step-by-step explanation:

Given ratio =7:5:3:4,

Sum of ratio terms =19

∴ Smallest part=(76×3/19)

=12

Hope it helps you.

The smallest part is 12

Explanation:

Given:

76 is divided into four parts in the ratio 7:5:3:4

To find:

The smallest part is

==>Let, the four parts be a,b,c and d

==> a+b+c+d=76

==> The ratio of divided part is 7:5:3:4

==> a = 7x

==> b = 5x

==> c = 3x

==> d = 4x

Apply the values,

==> 7x+5x+3x+4x = 76

==> 12x+3x+4x=76

==> 15x+4x=76

==> 19x = 76

==> x=76/19

==> x=4

==> a = 7(4)

==> a=28

==> b = 5(4)

==> b=20

==> c = 3(4)

==> c = 12

==> d = 4(4)

==> d=16

Comparing a,b,c and d

(A): 12

The smallest part is 12

Answer:

the sentence is already in negative

Answer:

it can't change into negative