what will happen if you reverse the connction of the coil on a electro magnet I will give Brainliest

Answer: The yellow light with a frequency equal to 5.21 x 1014 Hz will have a wavelength of E) 576 nm

Answer:

his type of shock is called inelastic

Explanation:

This exercise is for vehicle crashes, which corresponds to exercise is momentum conservation.

We must begin by defining a system formed by the two cars so that the forces during the crash have been intense and the moment is preserved.

Looking for the moments

initial. Before the crash

           p₀ = m₁ v₁₀

final. After the crash

           p_f = (m₁ + m₂) v

the conservation of the moment is written

           p₀ = p_f

           m₁ v₁₀ = (m₁ + m₂) v

This type of shock is called inelastic and has the characteristics that the kinetic energy is not conserved.

Answer:

Real image

Explanation:

The picture is real, but it is reversed and tiny. An picture generated by a pinhole camera has certain features. As compared item, the image created by a pinhole camera is normally pretty small and looks reversed both on the vertically and horizontally axis.

Answer:

ion know tbh

Explanation:

Answer:

A system of two co-axial cylindersof different diameters which rotate together is called wheel and axle example; the door knob , knob of the tap ,screw driver,water tap

Answer:

This question is inconclusive considering you are not representing either kinetic or potential energy. It would just have to be laying on the ground stagnant to have neither potential or kinetic energy.

Explanation:

Answer:

Resistance is proportional to length and inversely proportional to area.

L1 =  5 cm

L2 = 10 cm

L3 = 15 cm

A1 = k * (.50 cm)^2

A2 = k * (.25 cm)^2 = 1/4 A1

A3 = k * (.05 cm)^2= 1/100 A1

R1 = 1 * 1 = 1

R2 = 2 * 4 = 8 R1

R3 = 3 * 100 = 300 R1

R3 has greatest resistance

Answer:

Refraction is another way that waves interact with matter. ... Waves bend as they enter a new medium because they start traveling at a different speed in the new medium. For example, light travels more slowly in water than in air. This causes it to refract when it passes from air to water or from water to air.

Explanation:

i hope this helps but if it doesnt im rlly srry :p

Answer:

The answer is "12388.17"

Explanation:

[tex]l = 2.1 cm = 2.1 \times 10^{-2}\ m\\\\k = 1.00059\\\\\eta = \sqrt{k}= \sqrt{1.00059}\\\\\lambda = 663 nm = 663 \times 10^{-9}\ m[/tex]

Users now know that perhaps the number of fingers the shift is provided when a path difference [tex]\Delta d[/tex] are inserts between both the two arms  

[tex]N = \frac{\Delta d}{\lambda}[/tex]

The optical pull-up in the arm is initially given by

[tex]d = 2\eta l[/tex]

Its new length of the different sense as the reflection coefficient adjustments between [tex]\eta[/tex] (air) and 1 so if we evacuate air from of the arm (vacuum).

The new length of a path is therefore

 [tex]d'' = 2l[/tex]

Therefore, the different path  

[tex]\Delta d=d-d''=2l(\eta -1)[/tex]

So, The fringe shifts number are

[tex]N= \frac{2l(\eta -1)}{\lambda}[/tex]

    [tex]= \frac{2 \times 2.1 \times 10^{-2} (\sqrt{1.00059}-1)}{663 \times 10^{-9}}\\\\=12388.17[/tex]

Answer:962 hz

Explanation: got it right on acellus

The frequency of the siren when the cyclist is stationary will be 963 Hz.

The frequency of a wave is the number of cycles per second.

FRom the doppler effect,

f =f'[ (V+Vs/V-Vo) ]

Here, doppler shifted frequency f' = 894 Hz, Source is stationary, Vs =0. Velocity of observer Vo = 24.5m/s and velocity of sound wave V = 343m/s

Substitute the value into the expression , we get

f = 894 x [(343/343 - 24.5)}

f = 963 Hz

Thus, the frequency of the siren when the cyclist is stationary is 963 Hz.

Learn more about frequency.

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Answer:

It would be false

Explanation:

Lead is more reactive if  thats  what you mean

Answer:

D

Explanation:

Given that one rock is thrown upward at 4.5 m/s and another thrown downward at 3.4 m/s. What is the relative velocity of the first rock

from the perspective of the second rock? Assume that up is positive.

Solution.

Since both of them are moving in the opposite direction, the relative velocity of the first rock from the perspective of the second rock will be

Relative velocity = 3.4 - 4.5

Relative velocity = - 1.1 m/s

Therefore, the relative velocity from the perspective of the second rock is negative 1.1 m/s.

The correct answer is option D.

Answer:

f'₁ = 149.985 10⁶ Hz,    f'₂ = 150.0149 10⁶ Hz

Explanation:

We can solve this problem using the relativistic doppler effect

          f’= f₀  [tex]\sqrt{ \frac{1- \beta }{1+ \beta } }[/tex]

          β = v/c

where the velocity is positive for the emitter and the receiver are moving away

In this case we must calculate the speed of the Earth, they tell us to consider the orbit as circular

          v = w r

the angular velocity is related to the period

          w = 2π / T

we substitute

           v = 2π r / T

Let's reduce the period to the SI system

           T = 1 year (365day / 1 year) (24h / 1day) (3600s / 1h) = 3.15 10⁷ s

we substitute

           v = 2π 1.496 10¹¹ / 3.145 10⁷

           v = 2.989 10⁴ m / s

We have two maximum possibilities when the planets approach and when the planets move away

the change of the emitted frequency

            β = 2.989 10⁴/3 10⁸

            β = 0.99625 10⁻⁴

we substitute in the equation to find the two frequencies

               f’= f₀  [tex]\sqrt{ \frac{1- \beta }{1+ \beta } }[/tex]

planets move away

             f’₁ = 150 10⁶ [tex]\sqrt{ \frac{1 - 0.99625 \ 10^{-4}}{1 + 0.99625 \ 10^{-4}} }[/tex]

             f’₁ = 150 10⁶ [tex]\sqrt{ \frac{0.999900}{1.000099625} }[/tex]

             f’₁ = 1.50 10⁶ 0.999900

             f'₁ = 149.985 10⁶ Hz

planets approaching

             f’₂ = 150 10⁶ [tex]\sqrt{ \frac{1 + 0.99625 \ 10^{-4}}{1 - 0.99625 \ 10^{-4}} }[/tex]

             f’₂ = 150 10⁶   1.0000996

             f'₂ = 150.0149 10⁶ Hz

we see that the changes in the frequencies are extremely small

Answer:

B

Explanation: Given that an elevator moving down passes its neighbor, an elevator moving up. Their speed relative to one another is 8 m/s. What is the velocity of each elevator relative to someone standing on the first floor? Assume that the elevators are traveling at the same speed, and that the upward direction is positive.

O Both elevators are moving at 8 m/s.

y Falling Objects

O One elevator is moving at 4 m/s; the other elevator is moving at -4 m/s.

O Both elevators are moving at 4 m/s.

tive Velocity

O One elevator is moving at 8 m/s; the other elevator is moving at -8 m/s.

Solution.

Since the upward direction is positive, the downward direction will be negative.

For their speed relative to one another to be 8 m/s, the individual velocity will be:

4 - ( - 4 ) = 8

Therefore, the correct answer is:

One elevator is moving at 4 m/s; the other elevator is moving at -4 m/s

Which is option B

Because the negative sign multiply by negative sign will give positive.

That is,

4 + 4 = 8

Answer:

a)   I = 1,894 10¹⁰ W / m², b)  E = 1.376 10⁵ N / C

Explanation:

a) intensity is defined as energy per unit area per unit time

          I = P / A

let's reduce the magnitudes to the SI system

         P = 10 mW = 10 10⁻³ W

         d = 0.82 μm = 0.82 10⁻⁶ m

the laser area is

         A =π r² = π d²/4

         A =π (0.82 10⁻⁶)²/4

         A = 5.28 10⁻¹³ m²

we calculate

          I = [tex]\frac{10 \ 10^{-3}}{5.28 \ 10^{-13}}[/tex]

          I = 1,894 10¹⁰ W / m²

b) average intensity and electric field are related

          I = E * E

          E = √I

          E = [tex]\sqrt{1.894 \ 10^{10}}[/tex]

          E = 1.376 10⁵ N / C

Answer:

you Subtract

Explanation:

A = 6

B = 6

C = 0

D = 5

9-3= 6

13-7=6

11-11=0

6-1=5

Simple hope it helps

Answer:

Forces can affect an object.

Balanced forces allow an object to continue moving at a constant motion (law of inertia).

Unbalanced forces cause a change in motion.

Answer:

Because of my physics teacher I would put this entire explanation below if i were u

Explanation:

Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving.

Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity. Remember that acceleration is a change in velocity. So forces cause acceleration.

Answer:

C, weathering by the water.

Explanation:

While in the river, it scraps againsts other rocks and things, which causes it to change shape. For example be smoother and round.

Answer:

The boiling point temperature of this substance when its pressure is 60 psia is  480.275 R

Explanation:

Given the data in the question;

Using the Clapeyron equation

[tex](\frac{dP}{dT} )_{sat } = \frac{h_{fg}}{Tv_{fg}}[/tex]

[tex](\frac{dP}{dT} )_{sat } = \frac{\frac{H_{fg}}{m} }{T\frac{V_{fg}}{m} }[/tex]

where [tex]h_{fg[/tex] is the change in enthalpy of saturated vapor to saturated liquid ( 250 Btu

T is the temperature ( 15 + 460 )R

m is the mass of water ( 0.5 Ibm )

[tex]V_{fg[/tex] is specific volume ( 1.5 ft³ )

we substitute

[tex](\frac{dP}{dT} )_{sat } =( \frac{250Btu\frac{778Ibf-ft}{Btu} }{0.5})[/tex] / [tex]( (15+460)\frac{1.5}{0.5})[/tex]  

[tex](\frac{dP}{dT} )_{sat } =[/tex] 272.98 Ibf-ft²/R

Now,

[tex](\frac{dP}{dT} )_{sat } =[/tex] [tex](\frac{P_2 - P_1}{T_2 - T_1})_{sat[/tex]

where P₁ is the initial pressure ( 50 psia )

P₂ is the final pressure ( 60 psia )

T₁ is the initial temperature ( 15 + 460 )R

T₂ is the final temperature = ?

we substitute;

[tex]T_2[/tex] [tex]= ( 15 + 460 ) + \frac{(60-50)psia(\frac{144in^2}{ft^2}) }{272.98}[/tex]

[tex]T_2 = 475 + 5.2751\\[/tex]

[tex]T_2 =[/tex] 480.275 R

Therefore, boiling point temperature of this substance when its pressure is 60 psia is  480.275 R

Explanation:

The general equation of an AC current is given by :

[tex]I=I_o sin\omega t[/tex]

Where

I₀ is the peak value of current

[tex]\omega[/tex] is angular frequency

[tex]As\ \omega=2\pi f[/tex]

So,

[tex]f=\dfrac{\omega}{2\pi}\\\\f=\dfrac{100\pi}{2\pi}\\\\f=50\ Hz[/tex]

We know that,

[tex]I_{rms}=\dfrac{I_0}{\sqrt{2}}\\\\=\dfrac{20}{\sqrt{2}}\\\\I_{rms}=14.14\ A[/tex]

So, the frequency is 50 Hz and the maximum rms value of current is 14.14 A.

Answer: 20km

Explanation:

60 divided by 3 equals 20km

The more slanted the sun's rays are, the longer they travel through the atmosphere, becoming more scattered and diffuse. In the winter, Earth tilts away from the Sun.

Answer:

Rain came along with lower temps

Explanation:

There was no rain on the warmer days

There were more clouds as the week went on

and the temp decreased during the week so rain came with lower temps is the only one that can be correct

Magnetism is the result of the "spin" of the electron and most of these cancel each other out in larger bodies thus most things not being magnetic.