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Designing and making custom-made guitars is an example of which of the following processes?

iVinArrow [24]

Answer:

Intermittent process.

Explanation:

3 0

3 years ago

The SI unit of power is the watt. Which of the following units are equivalent to the watt?

Llana [10]

Answer:

The right option is (A) V.A

Explanation:

Power: This is the rate at which work is done. Or it is the produce of force and velocity. The S.I unit of power is Watt (W). Other units include Horse power(hp), foot-pound per minutes, etc.

Generally, power can be represented as,

Power = Energy/time

P = W/t......................... Equation 1

Where p = power, w = Work or energy, t = time in seconds.

Electrical energy: This is the product of potential difference and the quantity of charge.

∴ W = VQ............................... Equation 2

Where V = potential difference, Q = quantity of charge and W = Energy or Work done.

Also Q = It........................ Equation 3.

where I = current in ampere, t = time in seconds

Substituting equation 3 into equation 3

W = VIt............................ Equation 4.

Also substituting Equation 4 into Equation 1

P = VIt/t = VI = voltage(V)×Current(A)

Therefore the equivalent unit of power is

P = V.A.

The right option is (A) V.A

3 0

3 years ago

A diffraction grating is made up of slits of width = 340 nm with separation = 790 nm. The grating is illuminated by monchromatic

nika2105 [10]

Answer:

angular width is 0.10 degree

Explanation:

Given data

width = 340 nm

separation d = 790 nm

λ = 520 nm

to find out

how many maxima and width of a spectral line

solution

we know for maxima formula is

m λ = dsinθ

and we know here sinθ is between 0 and 1

so we can say

d is greater than m λ

and

m ≤ d / λ

m ≤ 790 / 520

m ≤ 1.52

its mean we have 3 maxima i.e. 0 , 1 and -1

and

for 1st order m = 1

so mλ = dsinθ

λ = dsinθ

θ = sin^-1 ( λ/d) ................................1

and angular width is

θ = λ/ Nd cosθ

θ = dsinθ / Nd cosθ

θ = tanθ /N ...............................2

so here put θ in 2 equation

angular width = tanθ/N

angular width = tan ( sin^-1 ( 520/790) ) / 500

angular width = tan 41.16 / 500

angular width = 1.7484 × $10^{-3}$ × 180/π

angular width = 0.10 degree

3 0

3 years ago

A singly ionized helium atom is in the ground state. It absorbs energy and makes a transition to the n = 3 excited state. The io

IRISSAK [1]

Answer:

$\lambda=25.6nm$

Explanation:

The Rydberg formula can be extended for use with any hydrogen-like chemical elements, that is to say with only one electron being affected by effective nuclear charge. So, in this case, we can calculate the wavelenghts of the emitted photons using this formula:

$\frac{1}{\lambda}=RZ^2(\frac{1}{n_1^2}-\frac{1}{n_2^2})$

Where R is the Rydberg constant of the element, Z its atomic number, $n_1$ is the lower energy level and $n_2$ the upper energy level of the electron transition. Recall that the ground state is denoted as n=1.