please help really easy

Answer:

[tex]\theta=4.5^{\circ}[/tex]

Explanation:

Given that,

The distance between reflecting planes is 0.541 nm, d = 0.541 nm

Let the wavelength is 0.085 nm

We need to find the smallest angle, measured from these planes, at which constructive interference. Using Bragg's equation to find it as follows :

[tex]m\lambda=2d\sin\theta[/tex]

For smallest angle, m = 1

[tex]\theta=\sin^{-1}(\dfrac{m\lambda}{2d})\\\\\theta=\sin^{-1}(\dfrac{1\times 0.085\ nm }{2\times 0.541\ nm })\\\\\theta=4.5^{\circ}[/tex]

So, the smallest angle is 4.5 degrees.

Answer:

the answer is magenta light

Explanation:

When red and blue light are combined, the result is magenta.. When green and blue light are combined, they make cyan. Red and green light make yellow.

Answer:

magenta light

Explanation:

red+blue=purple but the light makes the radius lighter so its magenta

Answer:

1923 N

Explanation:

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

Mass (m) = 65 Kg

Radius (r) = 2.5 m

Velocity (v) = 8.6 m/s

Centripetal force (F) =?

The centripetal force, F, can be obtained by using the following formula:

F = mv²/r

F = 65 × 8.6² / 2.5

F = 65 × 73.96 / 2.5

F = 4807.4 / 2.5

F = 1922.96 ≈ 1923 N

Thus, the magnitude of the centripetal's force acting on the student is approximately 1923 N

The correct answer is A.

Explanation

In nature, we can find three basic states of material, one of these is gas, that is characterized by far apart particles that move quickly in all directions; the second is solid that is characterized by close particles located in a definite pattern, and these only vibrate without losing its form, and third is the liquid, that is characterized for close particles with an undefined pattern, and its movement is around each other. According to the above, the image that best expresses the arrangement of particles in a liquid is option A, because there are particles close together and move around each other.

Answer:the correct answer is A the foggy looking brain pic

Explanation:

I selected C the separated looking particles that answer was wrong

Answer:

The value is  [tex]T = 288 \ N[/tex]

Explanation:

From the question we are told that

    The length of the guitar string considered is  [tex]L = 1.2 \ m[/tex]

     The mass is [tex]m = 0.006 \ kg[/tex]

Generally the tension is mathematically represented as

       [tex]T = 4f ^2 m* L[/tex]

Here f is the frequency of the [tex]A_2[/tex] note which is  [tex]f= 110 \ Hz[/tex]

So

     [tex]T = 4* 110 ^2 * 0.006* 1.2[/tex]

=>  [tex]T = 288 \ N[/tex]

Answer:

Explanation:

Given data

Density of concrete  ρ_c=2200kg/m3

Mass of concrete m_c= 25kg

In water

[tex]F_{P2} + F_{app}-m_{cg}=0[/tex]

[tex]F_{app}=m_{cg}-F_{P2}[/tex]

Max Fapp = 25*g

Buoyancy force

[tex]F_{P2} = \rho WgV_c= \rho Wg\frac{\rho_c}{m_c}\\\\F_{ p2}= \rho Wg\frac{\rho_c}{m_c}[/tex]

[tex]25*g=m_cg- \rho W g\frac{mW}{\rho_c}= m_cg(1- \frac{\rho W}{\rho_c} )[/tex]

[tex]m_c=25( \frac{\rho_c}{\rho_c- \rho W} )[/tex]

substitute

[tex]m_c=25( \frac{2200}{2200- 1000} )\\\\m_c=25*1.833\\\\m_c=45.8[/tex]

=46kg approx.

Answer:

it's the distance between objects in space

Explanation:  Light travels super fast; but it still takes a long time to travel between objects in space. This is because distances between objects in space are enormous.

And can i please receive a brainliest  and have a good day

Q. 380 If a planet has an average distance from the sun (semi-major axis of its orbit) of 4 astronomical units, what is the period of its orbit?

A. 1 years

B. 4 years

C. 64 years

D. 8 years

Q. 382 If a planet has an average distance from the sun (semi-major axis of its orbit) of 4 astronomical units, what is the period of its orbit?

A. 8 years

B. 1 years

C. 12 years

D. 64 years

Chapter 4; Problems 3, 5 3) If a planet has an average distance from the Sun of 4 AU, what is its orbital period? P2 = 43 = 64 P = 64 = 8 years

In conclusion:

The answer is 8 years

If a planet has an average distance from the sun (semi-major axis of its orbit) of 4 astronomical units, then the period of the orbit would b 8 years, therefore the correct answer is option D.

The square of a planet's orbital period is proportional to the cube of the length of the semi-major axis of its elliptical orbit.

a³ = T²

As given in the problem If a planet has an average distance from the sun (semi-major axis of its orbit) of 4 astronomical units,

4³= T²

T = √64

T = 8 years

Thus, the correct answer is option D.

To learn more about Kepler's laws of planetary motion, refer to the link;

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Your question is incomplete, the complete question is,

If a planet has an average distance from the sun (semi-major axis of its orbit) of 4 astronomical units, what is the period of its orbit?

A. 1 year

B. 4 years

C. 64 years

D. 8 years

Given:

Mass of the runner (m) = 50 kg

Speed of the runner (v) = 2 m/s

Equation:

[tex] \rm KE = \dfrac{1}{2} mv^2[/tex]

Answer:

By substituting values in the equation, we get:

[tex] \rm KE = \dfrac{1}{2} \times 50 \times 2^2 \\ \\ \rm = \dfrac{1}{2} \times 50 \times 4 \\ \\ \rm = 25 \times 4 \\ \\ \rm = 100 \: J[/tex]

[tex] \therefore [/tex] Kinetic energy of the runner = 100 J

Answer:

Given,

mass(m)=50kg

velocity(v)=2m/s

kinetic energy(K.E.)=?

We know that K.E.=1/2mv2

KE=1/2×50×2^2

Explanation:

=1/2×200

=100 Joule

Explanation:

A disorder that occurs when structures that produce energy for a cell malfunction.

A common factor among mitochondrial diseases is that the mitochondria are unable to completely burn food and oxygen to generate energy, which is essential for normal cell function. It's often inherited

Answer:

about 186,000 miles per second

Explanation:

so your closest bet is probably 175 miles per second

Answer:

Correct answer is 90,000 miles PER SECOND

Explanation:

Answer:

The magnification would be "103.55". A further explanation is given below.

Explanation:

The given values are:

Distance between lens and eyepiece,

L = 85 cm

Eyepiece is,

= 123 D

Now,

The refractive power of eye piece will be:

⇒ [tex]\frac{1}{f_e}=123D[/tex]

   [tex]f_e=\frac{1}{123D}[/tex]

   [tex]f_e=0.813 \ cm[/tex]

The length of the telescope will be:

⇒ [tex]L=f_0+f_e[/tex]

⇒ [tex]f_0=L-f_e[/tex]

On substituting the values, we get

⇒     [tex]=85-0.813[/tex]

⇒     [tex]=84.187 \ cm[/tex]

Now,

The magnification of the telescope will be:

⇒ [tex]M=\frac{f_0}{f_e}[/tex]

⇒      [tex]=\frac{84.187}{0.813}[/tex]

⇒      [tex]=103.55[/tex]

Answer:

Calculating the magnitude of a vector is only the beginning. The magnitude function opens the door to many possibilities, the first of which is normalization. Normalizing refers to the process of making something “standard” or, well, “normal.” In the case of vectors, let’s assume for the moment that a standard vector has a length of 1. To normalize a vector, therefore, is to take a vector of any length and, keeping it pointing in the same direction, change its length to 1, turning it into what is called a unit vector.To normalize a vector, simply divide each component by its magnitude. This is pretty intuitive. Say a vector is of length 5. Well, 5 divided by 5 is 1. So, looking at our right triangle, we then need to scale the hypotenuse down by dividing by 5. In that process the sides shrink, divided by 5 as well.

I hope this is helpful, Have a Great Day!!

Hello!

Topic: Magnetic material

Why are magnetic materials attracted to magnets?

Because when you expose any magnetic material to a magnetic field, magnetc material atoms start to align their electrons, because they flow by magnetic fields.

Then the atoms reacts to the field, and try to get together to the magnetic electrons field.

Thats why magnetic materials are attracted to magnets.

Answer:

sound waves

Explanation:

SONAR (originally an acronym for Sound Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.

In this method, to find the depth of an ocean, a strong ultrasonic wave is sent from the ship towards the bottom of the ocean. This ultrasonic wave is received back after it is reflected from the bottom of the sea. The time interval t for travel of sound waves from the source to the receiver after reflection is noted.The distance travelled by the ultrasound ray is given by the equation:  2d=vt, where v is the velocity of sound. From this the depth d can be calculated.

Answer:

Sonar uses sound waves to 'see' in the water.

Sonar, short for Sound Navigation and Ranging, is helpful for exploring and mapping the ocean because sound waves travel farther in the water than do radar and light waves.Sonar (sound navigation ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.[2] Two types of technology share the name "sonar": passive sonar is essentially listening for the sound made by vessels; active sonar is emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation,[3] and SODAR (an upward-looking in-air sonar) is used for atmospheric investigations. The term sonar is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low (infrasonic) to extremely high (ultrasonic). The study of underwater sound is known as underwater acoustics or hydroacoustics.

Explaining the concept:

Reaction force is the equal and opposite force applied by an object after we apply some force to it

This is explained in the Newton's Third Law of Motion, which says: "For every action, there is an equal and opposite reaction"

This means that any force we apply on an object, it applies the same force on us

Reaction Force exerted by the ball:

We now know what a reaction force is. Now looking at the scenario, we can see that the player applied a force of 1000N on the ball using his bat

The ball will also apply an equal and opposite force on the Bat,

So, the ball will apply a force of 1000N on the Bat

Therefore, Option C is correct

[tex]{\tt{\red{\underline{\underline{\huge{Answer:}}}}}}[/tex]

[tex]\longrightarrow[/tex] The rate of change of velocity per unit time is called acceleration.

[tex]\longrightarrow[/tex] Its SI unit is m/s².

[tex]\huge\boxed{\fcolorbox{blue}{red}{Thank you}} [/tex]

Answer:

3.5 s

Explanation:

Given

[tex]Initial\ Velocity (u) = 0m/s[/tex] --- because it starts from rest

[tex]Height\ (S) = 60\ m[/tex]

Required

Determine time (t) to hit the ground

This can be solved using the following motion equation

[tex]S = ut + \frac{1}{2}gt^2[/tex]

Substitute values for S and u and take g as 9.8m/s^2

[tex]60 = 0 * t + \frac{1}{2} * 9.8 * t^2[/tex]

[tex]60 = 0 + \frac{1}{2} * 9.8 * t^2[/tex]

[tex]60 = \frac{1}{2} * 9.8 * t^2[/tex]

Multiply through by 2

[tex]2 * 60 = 2 * \frac{1}{2} * 9.8 * t^2[/tex]

[tex]120 = 9.8 * t^2[/tex]

Solve for t^2

[tex]t^2 = \frac{120}{9.8}[/tex]

[tex]t^2 = 12.2448979592[/tex]

Take square roots

[tex]t = \sqrt{12.2448979592[/tex]

[tex]t = 3.49927106112[/tex]

[tex]t=3.5\ s[/tex] ---- approximated

It would take a stone released from a height of 60m, 3.5s to hit the ground.

EQUATION OF MOTION:

Where;

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Answer:

The answer is numberline, D

Explanation:

I got it right on edge

Answer:

A

Explanation:

Scale

Got it right on Edge:)

Answer: B

Explanation:

Answer:

Bacteria

Explanation:

Answer:

The answer is bacteria.

Explanation:

Bacteria were the first known multi-celled organism on Earth.

Answer:  B    | The rain falls mostly as snow during the winter.

Answer:

C

Explanation:

The increase in the distance between equilibrium positions for the vibrating atoms.

By increasing the distance between equilibrium positions for the vibrating atoms.  

• The tendency of matter to change its area, shape, density, and volume in response to a change in temperature is termed as thermal expansion.  

• The thermal expansion of a solid can result by enhancing the distance between the equilibrium positions for the vibrating atoms.  

• With the supply of thermal energy, the amplitude of the vibration of the atoms enhances. Thus, post providing some heat energy, the distance between the equilibrium positions for the vibrating atoms enhances.  

Thus, the correct statement is option c.

To know more about:

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