a water wave has a speed of 23.0 meters/second. if the waves frequency is 0.0680 hertz, what is the wavelength

Answer:

The current moving through tha circuit changes direction.

Explanation:

hope this helps

The electromagnet is activated. It causes a buzzer to go off. The hammer strikes the bars which creates sound. When you let go, it will stop making a sound by the circuit stop flowing.

"Electromagnet, device consisting of a core of magnetic material surrounded by a coil through which an electric current is passed to magnetize the core. An electromagnet is used wherever controllable magnets are required, as in contrivances in which the magnetic flux is to be varied, reversed, or switched on and off."

"A circuit is a complete circular path that electricity flows through. A simple circuit consists of a current source, conductors and a load. The term circuit can be used in a general sense to refer to any fixed path that electricity, data or a signal can travel through."

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Answer: 67 how much candy does nick have

Explanation:

Answer:

The answer is true, as gravity affects everything.

Answer:

the central nervous system

Answer: C. central

Explanation:

Answer:

Explanation:

1400 m/s2

The acceleration of the ball when it hits the vertical wall is -1,400 m/s²

The given expression:

velocity of the ball, v = 28 m/s

time of  motion of the ball, t = 0.02 s

To find:

The acceleration of the ball is calculated as follows:

[tex]acceleration = \frac{\Delta velocity}{\Delta time} = \frac{Final \ velocity\ - \ initial \ velocity }{time} \\\\final \ velocity \ of \ the \ ball \ when \ it \ hits \ the \ wall = 0\\\\acceleration = \frac{0 - 28}{0.02} \\\\acceleration = - \ 1,400 \ m/s^2[/tex]

Thus, the acceleration of the ball when it hits the vertical wall is -1,400 m/s²

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Answer: D. 6.1 m/s^2

Explanation:

Answer:

According to law of reflection i know in case of plane mirror the angle of reflection is equal to the angle of incidence. So,if you placed the eye on point A the hole can be seen.

Explanation:

Answer:

[tex]a = 2.56\ m/s^2[/tex]

Explanation:

Mechanical Force

According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:

F = m.a

Where a is the acceleration of the object.

The object has a mass of m=430 g = 0.43 Kg and is pushed by a net force of F=1.1 N. To calculate the acceleration, we solve for a:

[tex]\displaystyle a=\frac{F}{m}[/tex]

[tex]\displaystyle a=\frac{1.1}{0.43}[/tex]

[tex]\mathbf{a = 2.56\ m/s^2}[/tex]

Answer:I think it’s because both can provide heat and cold

Explanation:

1 spring k=100

2 springs k =200

f=kx

then k=f/x

200=150/x

x=200/150

x=4/3

Explanation:

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The total extension caused by the 150N weight is 1.5 m

From Hooke's law,

Force (F) = spring constant (K) × extention (e)

F = Ke

150 = 100 × e

Divide both side by 100

e = 150 / 100

e = 1.5 m

Therefore, the total extention caused by the weight is 1.5 m

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Answer:

92127.2 j

Explanation:

Given that :

Mass of water = 290 g

Specific heat of water (C) = 4.18 j/g.C

Initial Temperature (t1) = 24°C

Final temperature (t2) = 100°C

Using the relation :

Q = mCdt

dt = change in temperature =( 100 - 24)° = 76°C

Q = quantity of heat ; C = specific heat capacity;

m = mass of substance

Q = 290 g * 4.18 j/g.C * 76°C

Q = 92127.2 j

Answer:

a collision occuring between two objects in an isolated system, the total momentum of the two objects after the collision. That is, the momentum lost by object 1 is equal to the momentum gained by object 2.

thank you.

Answer:

correct order 2,4,3,1

Explanation: correct on edge

Answer:

Answer: the intensity of the light that passes through the set of polarizers is  0.7285 S₀

Explanation:

based on the data in the question;

As the first polarizer lets all the light through because its plane of polarization is not different from light.

The second polarizer has 2 effects;

firstly, it reduces the intensity by a factor cos²0.3927^c; if you switch the calculator to radians mode, this will give you 0.85355

Secondly; it changes the plane of polarization of the light to be the same as the polarizer; therefore the light now has a plane of polarization of 0.3927 rad to the horizontal.

Hence;

after the second effect, the light enters the third polarizer at 0.3927 rad to the plane of polarization of third polarizer. So the intensity is again reduced by a factor 0.85355.

Therefore

the Overall reduction is by a factor of 0.85355 × 0.85355 S₀

= 0.7285 S₀

Therefore the intensity of the light that passes through the set of polarizers is  0.7285 S₀

Complete Question

the maximum force a pilot can stand is about seven times his weight. what is the minimum radius of curvature that a jet plane's pilot, pulling out of a vertical dive, can tolerate at a speed of 250m/s?

Answer:

The value is    [tex]r = \frac{250^2 }{6 * 9.8 }[/tex]

Explanation:

From the question we are told that

 The  weight of the pilot is   [tex]W = mg[/tex]

 The maximum force a pilot can withstand is  [tex]F_{max} = 7 W = 7 (mg)[/tex]

 The speed is  [tex]v = 250 \ m/s[/tex]  

Generally the centripetal force acting on the pilot is equal to the net force acting on the pilot i.e

      [tex]F_c = F_{max} - mg[/tex]

Here N  is the normal force acting on the pilot

Now

      [tex]F_c = \frac{m v^2 }{r}[/tex]

So

      [tex]\frac{m v^2 }{r} = 7(mg) - mg[/tex]  

=>  [tex]r = \frac{v^2 }{6g}[/tex]

=>  [tex]r = \frac{250^2 }{6 * 9.8 }[/tex]

=>  [tex]r = 1063 \ m[/tex]

Answer:

f = 0 N

Explanation:

It is given that,

A horse pulls a wagon with 2000N of at constant velocity.

We need to find the friction acting on the wagon.

As the wagon is pulled with a constant velocity. If its velocity is constant, it means its acceleration is 0. As a result friction force is 0.

Hence, the correct option is (a).

Answer:

use hot water

Explanation:

hot water helps dissolve things faster

Answer:

The surface charge density on planes A and B respectively is

     [tex]\sigma__{A}} } = 2\sigma[/tex]

and

     [tex]\sigma__{B}} = \sigma[/tex]

Explanation:

From the question we are told that

     The  electric field in region to the left of  A  is  [tex]E_i = \frac{3 \sigma}{2 \epsilon_o}[/tex]

      The  direction of the electric field is  left

      The  electric field in the region to the right of  B  is  [tex]E_f = \frac{3 \sigma}{2 \epsilon_o}[/tex]

      The  direction of the electric field is  right

      The  electric field in the region between the two planes is  [tex]E_m = \frac{\sigma }{2 \epsilon_o }[/tex]

       The  direction of the electric field is  right

Let the surface charge density on planes A and B be represented as [tex]\sigma__{A}} \ \ and \ \ \sigma__{B}} \ \ \ respectively[/tex]

 From the question we see that

         [tex]E_i = E_f[/tex]

Generally the electric to the right and to the left is due to the combined electric field generated by  plane  A and  B  so

         [tex]E_i = E_f = \frac{3\sigma }{2\epsilon} = \frac{\sigma_A }{ 2 \epsilon_o } + \frac{\sigma_B }{ 2 \epsilon_o }[/tex]

=>      [tex]\sigma__{A}} + \sigma__{B}} = 3 \sigma -- -(1)[/tex]

Generally the electric field at the middle of the plane A and  B  is due to the diffencence in electric field generated by plane A and  B      

i.e

          [tex]\frac{\sigma }{2 \epsilon_o } = \frac{\sigma_A }{ 2 \epsilon_o } - \frac{\sigma_B }{ 2 \epsilon_o }[/tex]

=>      [tex]\sigma__{A}} - \sigma__{B}} = \sigma[/tex]

=>      [tex]\sigma__{A}} } = \sigma + \sigma__{B}[/tex]

From equation 1

        [tex]\sigma + \sigma__{B}}+ \sigma__{B}} = 3 \sigma[/tex]

=>    [tex]\sigma__{B}} = \sigma[/tex]

So

      [tex]\sigma__{A}} } = \sigma + \sigma[/tex]

=>   [tex]\sigma__{A}} } = 2\sigma[/tex]

Answer:

TRUE THE ANSWER IS TRUE

Explanation:

When the Javelin is at rest on the ground, Potential Energy and Kinetic Energy are zero.  immediately the Athlete picks the javelin up from the ground, there is an increase in the Kinetic Energy this increase continues until the javelin comes to a halt. Potential Energy also increases.

As the Athlete throws javelin, there is a decrease in the Potential Energy, the Kinetic Energy increases simultaneously until the javelin hits the ground.

after which Potential Energy  and Kinetic Energy becomes zero.

Answer:

E = - 2*E₀*sinθ*i

V = V = 2*E₀*sinθ /r

Explanation:

First situation: a quarter-circle rod produces at the origin

E₀      and  V₀

We know that    E  =  K *  Q/r      and

E  =  E₀           Q = L*λ           Q = 1/4 * 2*π*r*λ       Q = (1/2)*π*r*λ

where:

r is the radius of the circle which at the same time is the distance between the rod quarter of the circle and the origin.

λ is the longitudinal density of charge, and

k = 1/4*π*ε₀

Then    E₀ =  (1/2)* k*π*λ        and   V₀  = - E₀/Q         V₀  = - E₀/r

E₀  =  E₀ₓ  +  E₀y      E₀ₓ  = E₀*cosθ    E₀y = - E₀*sinθ  

θ the angle between E₀  and the x-axis

Second situation half of a circle ( first quarter +Q and fourth -Q )

In that configuration, the components in the x-axis cancel each other ( by symmetry) and the y-axis components of +Q  and -Q  are to be added then

E = Eₓ   +  Ey     but by inspection we find Eₓ  = 0 ( the components of the        

the electric field produced of the two quarters canceled each other)

and we have to add the two identical y-axis components of the two quarters therefore

E = 2*E₀y

each component of   E₀y = - E₀*sinθ    

Then the new electric field becomes

E = - 2*E₀*sinθ*i

The new V  = - (- 2*E₀*sinθ /r)

V = 2*E₀*sinθ /r

(Note remember that V is a scalar )

Answer:

1. Brown dwarf.

2. Red giant.

3. Black dwarf.

4. White dwarf.

5. Black hole.

Explanation:

A star is a giant astronomical or celestial object that is comprised of a luminous sphere of plasma, binded together by its own gravitational force.

Basically, stars are typically made up of two (2) main hot gas, Hydrogen (H) and Helium (He).

Some of the examples of stars are; Canopus, Sun (closest to the Earth), Betelgeus, Antares, Vega etc.

1. Brown dwarf: does not undergo hydrogen fusion.

2. Red giant: has an outer shell of burning hydrogen and a core of helium.

3. Black dwarf: a white dwarf that has lost all its energy.

4. White dwarf: has a core of carbon that is not massive enough to fuse. A white dwarf also known as degenerate dwarf is a star or an electron degenerate matter and is as massive as the Sun but only about as large in size as planet Earth. Also, the maximum mass of a white dwarf is about 1.4 times the mass of the Sun.

5. Black hole: formed from the collapse of a white dwarf beyond 1.5 solar masses.

Answer:

other person is correct!!!

Explanation:

got 100 on test

Answer:

Bus will take 4 seconds before it comes to rest.

Explanation:

Initial Velocity  of bus = u = 20 ms⁻¹

Final Velocity of bus = v = 0 ms⁻¹

Deceleration of bus = a = -5 ms⁻²

Time taken by bus before it comes to rest = t = ?

Using the equation formula

a = (v - u)/t

-5 = (0 - 20) / (t)

t = -20/-5

t = 4 sec

Therefore, Bus will take 4 seconds before it comes to rest.

Explanation:

Speed is the distance an object travel per unit of time

Answer:

10

Explanation:

Given that :

Initial Velocity (u) = 25 m/s

Range can be obtained using the relation :

Range = (u² * sin2θ) / g

g = 10m/s ; θ = 45

Range = [10² * sin2(45)] / 10

Range = [100 * 1] ÷ 10

Range = 10

Answer:

A

Explanation:

OKAY REAL QUICK A NOTE REPRESENTS THE 12 TONES ON THE CHROMATIC SCALE WHICH IN TURN REPRESENTS THE WHOLE OF SOUND IN ALL MUSIC- EACH NOTE HAS A PITCH THAT REPEATS IN EVERY OCTAVE.

Answer:

2361.6N

Explanation:

Mass of player = 82kg

Velocity = 1.2m/s

Kinetic energy of player:

= 1/2mv²

= 1/2*82*1.2²

= 41x1.44

= 59.04J

Final kinetic energy = 0

Change in kinetic energy

|∆k| = |0-59.04|

= 59.04

Workdone by the feet = fd

d = 0.025

Fd = 59.04

F = 59.04/0.025

= 2361.6N

This is his average force.

Answer:

I am going to answer you just wait a little bit.