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Answer:

Angle of diffraction for second order maxima is θ = 18.941°

Explanation:

From the question it is given that

wavelength of incident light = λ = 541 nm = 541 x [tex]10^-^9 m[/tex]

order of maxima = n =2

diffraction grating has 600 lines per mm

⇒ distance between two slit is [tex]\frac{1mm}{600}[/tex] = 1.66 x [tex]10^-^6[/tex] m

using the relation of Braggs diffraction formula i.e.,

2dsinθ = nλ ..................................(1)

where, d = distance between two lines of grating

θ is the angle of diffraction

n= order of maxima

λ is the intensity of incident photon

on substituting the respected values in relation (1) we get,

2 x 1.66 x [tex]10^-^6[/tex]m sinθ = 2 x 541 x [tex]10^-^9 m[/tex]

⇒ sinθ = 0.3246

⇒ θ = [tex]sin^-^1(0.3246)[/tex] = 18.941 °

Answer:

Commensalism

Explanation:

Trust Me

The symbiotic relationship in which one organism benefits and the other is harmed (+/-) is called parasitism. For example, infectious microbes living in our body.

The long term relationship between two different kind of living organism is called symbiosis. There are different types symbiotic relations namely, mutualism, commensalism, parasitism etc.

The interaction in which both organism gets helped by each other is called mutualism. For example, fid fruit and flies. If only one organism is helped by the interaction and the other is not affected is called commensalism.

symbiotic relationship in which one organism benefits and the other is harmed (+/-) is called parasitism. The organisms which make threat to the other by this interaction are called parasites.

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The full cycle of moon phases averages 29.531 days. A quarter of that is 7.38 days. So "7 days" is a pretty good approximation for casual conversation. It's true.

Answer:True

Explanation:

The full cycle of the moon is 29.631 or we could say 29.5 and the quarter is 7.34 I think so yes it’s true it’s appropriately a full average and if you subtract this two it true

Answer:

W=f×d

w=45×27

w=1215 j.............

Answer:

Isobars are similar to height lines on a geographical map, and they are drawn so that they can never cross each other. Meteorologists use isobars on weather maps to depict atmospheric pressure changes over an area and to make predictions concerning wind flow.

Explanation:

Answer:Isobars are similar to height lines on a geographical map, and they are drawn so that they can never cross each other.

Explanation:

Answer: the drink cooled down to the same temperature as the room it was in.

Explanation: due to the change and temperature of the room, it cause the heat particles to exchange, causing it cool

Explanation:

Needles sinks in water due to the more density of needles than the density of water. But ship is made hollow and contains air. So it's average density Is less than that of water. It displaces the liquid of it's own weight causing the ship to float on water.

So, it it possible for iron ships to float on water,but needles sink when dropped in water.

Hope it will help :)❤

Answer:

Breakdown of rocks

Hope this helps :)

Answer:

Disintegration of rocks without chemical change.

The correct answer would be

D. Science and technology have increased food and reduced death rates due to illness and malnutrition.

I took this on USATestPrep, it's 100% right

Answer:

the mass stays the same

Explanation:

the more mass the faster

Answer:

The mass stays the same

Explanation:

i had this question and got it right

Answer:

125.44 N

Explanation:

From the question given above, the following data were obtained:

Weight on earth = 784 N

Acceleration due to gravity of the moon (gₘ) = 1.6 m/s²

Weight on moon =?

Next, we shall determine the mass of the person. This can be obtained as follow:

Weight on earth (Wₑ) = 784 N

Acceleration due to gravity of earth (gₑ) = 10 m/s²

Mass (m) =?

Wₑ = m × gₑ

784 = mass × 10

Divide both side by 10

Mass = 784 / 10

Mass = 78.4 Kg

Finally, we shall determine the weight of the person on moon. This can be obtained as follow:

Mass (m) = constant = 78.4 Kg

Acceleration due to gravity of the moon (gₘ) = 1.6 m/s²

Weight on moon (Wₘ) =?

Wₘ = m × gₘ

Wₘ = 78.4 × 1.6

Wₘ = 125.44 N

Therefore, the weight of the person on moon is 125.44 N.

Answer:

The volume of water displaced by the raft is 0.233 m³

Explanation:

The question relates to Archimedes' principle which states that the buoyant force experienced by an object immersed in a fluid is equal to the weight of (the force of gravity on) the displaced fluid

The given parameters are;

The combined mass of the person and the raft, m = 233 kg

The liquid on which the raft is located = Water

The density of water, [tex]\rho _{water}[/tex] = 1000 kg/m³

Weight = Mass, m × g

Where;

m = The mass of the object

g = The acceleration due to gravity = 9.8 m/s²

Given that the raft is on the surface of the water (floating), the buoyant force is equal to the combined weight of the person and the raft = 233 kg

The combined weight of the person and the raft, [tex]W_{combined}[/tex] = 233 kg × 9.8 m/s² = 2,283.4 N

Therefore;

The buoyant force = 2,283.4 N = The weight of the water displaced

The mass of the water displaced, [tex]m_{water}[/tex], = 2,283.4 N/(9.8 m/s²) = 233 kg

Density = Mass/Volume

The volume of water displaced by the raft = The mass of the water displaced/(The density of the water) = 233 kg/(1,000 kg/m³) = 0.233 m³.

Answer:

the volume displaced by the raft = 0.233 m3

Explanation:

correct for Acellus

Answer:

its b

Explanation:

cause im in  7th grade ive been asked the same question

Answer:

flows quickly

Answer:

The spring stretches or compresses 0.8 m (80 cm)

Explanation:

Hooke's Law

The force (F) needed to stretch or compress a spring by some distance Δx is given by

[tex]F=-k\Delta x[/tex]

Where k is a constant factor characteristic of the spring.

We are given the constant of a spring k=50 N/m and it's required to calculate the displacement Δx produced by a force of F=40 N. Solving for Δx:

[tex]\displaystyle \Delta x=\frac{F}{k}[/tex]

[tex]\displaystyle \Delta x=\frac{40}{50}[/tex]

Calculating:

[tex]\displaystyle \Delta x=0.8\ m[/tex]

The spring stretches or compresses 0.8 m (80 cm)

Answer:A pendulum consists of a ball at the end of a massless string of length 1.4 m. The ball is released from rest with the string making an angle of 20 degrees with the vertical. What is the maximum speed of the pendulum?

Explanation: Have a great day and oh here is a little something to warn the great people. In the comments....

;)

Answer:

it's answer is 5 seconds,

Explanation:

Given

Power (p) = 400 watt

work (w) = 2000 J

time taken (t) = ?

we know that,

p = w/t

400 = 2000 / t

t = 2000/400

Therefore t = 5 sec

The star’s core shrinks, this happens first when a star begins to run out of fuel. Hence option A is correct.

A star is a type of celestial object that consists of a bright spheroid of plasma kept together by self-gravity. The Sun is the closest star to Earth. Many other stars can be seen with the open eye at night, but due to their great distances from Earth, they appear as fixed points of light. Many of the brightest stars have proper names, and the most prominent stars have been classified into constellations and asterisms. Astronomers have put together star catalogues that identify known stars and offer conventional stellar designations. An estimated 1022 to 1024 stars exist in the visible cosmos. Only about 4,000 of these stars can be seen with the open eye, and they are all located within the Milky Way galaxy.

Hence option A is correct.

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Answer:

D

Explanation:

they are both poor conductors of heat so that people who works with heat won't get affected by heat

Answer:

because the gas within the black box will absorb more heat than that in the surrounding

Explanation:

this is because the black color has a tendency of absorbing heat

Answer:

For Jin, the speed of the arrow is 13 m/s, and for the archer, the speed of the arrow is 17 m/s.

Explanation:

EDGE2020 :)

B

Answer:

B.

Explanation:

Edge 2021

Answer:

534.7

Explanation:

55/1010 = 0.0545m^3

1000(0.0545)(9.81) = 534.7 N (kept at 4 sig figs)

Answer:

They are Transverse Waves.

Answer: Transverse waves

Answer:

50,000 J because of the transformation of energy

Explanation:

Answer:

Prats of the bicycle are a seat and tires

Simple Machines are brakes and a handler

Answer:

v=u+at

v=21+1.4(11)

v=21+15.4

v=36.4

Answer:

The nitrogen cycle is a natural process that adds nitrogen to the soil. However, the use of fertilizers has increased the amount of usable nitrogen in the soil. The extra nitrogen seems appealing from the agricultural viewpoint that more nutrients in the soil means higher yield crops...