10 points urgent due in 10

What wave properties are involved in a glass knocking over?

Answer:

So to find the current drawn, simply divide the power by the operating voltage. In the United States, most household appliances work at 110 Volts. So the calculation is divide the Wattage by 110.

Explanation:

i don't  know  if that correct because  i just copied and pasted  but it sounds right

Answer:

I think it is a parabola.

Complete Question

The A-36 hollow steel shaft is 2 m long and has an outer diameter of 40 mm. When it is rotating at 77 rad/s , it transmits 32 kW of power from the engine E to the generator G. The shear modulus of elasticity for A-36 steel is 75 GPa.

Determine the smallest thickness of the shaft if the allowable shear stress is Tallow 140 MPa and the shaft is restricted not to twist more than 0.05 rad

Answer:

The value is [tex]t = 8.28 *10^{-3} \ m[/tex]

Explanation:

From the question we are told that

    The  length is  [tex]l = 2 \ m[/tex]

     The outer diameter is [tex]d_o = 40 \ mm = 0.04 \ m[/tex]

     The angular speed is  [tex]w = 77 \ rad/s[/tex]

      The amount of power transmitted is   [tex]P = 32 \ kW = 32*10^{3} \ W[/tex]

        The shear modulus of elasticity is  [tex]G = 75 GPa = 75 *10^{9} \ Pa[/tex]

         The allowable shear stress is  [tex]\tau_{allow} = 140 MPa = 140 *10^{6}\ Pa[/tex]

         The allowable angular displacement is  [tex]\theta = 0.05 \ rad[/tex]

Generally the power transmitted is mathematically represented as

         [tex]P = \tau * w[/tex]

Here [tex]\tau[/tex] is the amount of  torque generated by  the  hollow steel shaft

        [tex]32*10^{3} = \tau * 77[/tex]

=>     [tex]\tau = 415.6 \ N\cdot m[/tex]

Generally the polar moment of inertia of the  hollow steel shaft is mathematically represented as

      [tex]J = \frac{\pi}{32 } ( d_o^4 - d_i^4 )[/tex]

Generally the allowable displacement of the hollow steel shaft is mathematically represented as

       [tex]\theta = \frac{\tau * l }{ G J }[/tex]

=>  [tex]\theta = \frac{ 415.6 * 2 }{ 75*10^{9} * \frac{\pi }{ 32} * ( d_o^4 - d_i^4 ) }[/tex]

=>  [tex]0.05 = \frac{ 415.6 * 2 }{ 75*10^{9} * \frac{\pi }{ 32} * ( 0.04^4 - d_i^4 ) }[/tex]

=>  [tex]d_i = 0.0235 \ m[/tex]

Generally the thickness of  the shaft is mathematically represented as

       [tex]t = \frac{d_o - d_i }{2}[/tex]

=>   [tex]t = \frac{0.04 - 0.02345 }{2}[/tex]

=>   [tex]t = 8.28 *10^{-3} \ m[/tex]

Answer:

A first-class lever has the fulcrum between the load and the effort. A second-class lever has the load between the effort and the fulcrum. A third-class lever has the effort between the load and the fulcrum. A see-saw is an example of a first-class lever.

Explanation:

Answer:

Yes, the density of an object is proportional to its conductivity.

Explanation:

The "Thermal conductivity" of an object is dependent on three things: temperature, density and moisture content. This means that an object becomes more conductive if it has a higher temperature, higher density and more moisture in its content. This makes them directly proportional to each other.

The denser an object is, the more likely it will conduct heat because its atoms are tightly packed compared to less denser ones like air. Such position of atoms hastens the transfer of energy.

The correct answer is D. It asks about a cause-and-effect relationship between two variables.

Explanation:

In most cases, the purpose of a scientific investigation is to understand the way one phenomenon is affected by a specific factor. For example, through scientific investigation, it is possible to know to what extent nutrition affects learning or how temperature changes affect plant growth. This implies the factors involved, which are formally called variables, have a cause-and-effect relationship because it is expected one of the factors affects or changes the other. Moreover, in this investigation researchers cannot modify or change the results. In this context, the most appropriate statement for a scientific investigation is "It asks about a cause-and-effect relationship between two variables."

Heya!!

For calculate aceleration, lets applicate second law of Newton:

                                                   [tex]\boxed{F=ma}[/tex]

                                                 Δ   Being   Δ

                                             F = Force = 78,3 N

                                            m = Mass = 24,5 kg

                                             a = Aceleration = ?

⇒ Let's replace according the formula and clear "a":

[tex]\boxed{a=78,3\ N / 24,5\ kg}[/tex]

⇒ Resolving

[tex]\boxed{a=3.19\ m/s^{2}}[/tex]

Result:

The aceleration is 3,19 meters per second squared (m/s²)

Good Luck!!

Answer:

part of input energy is wasted

it is used to increase the entropy of the surrounding

therefore the useful energy output is necessarily smaller than the energy input

in other words the efficiency of heat engine is always less than hundred percent

Answer:

The system's Mean Time to Failure is 1,041.[tex]\bar 6[/tex] hours

Explanation:

The number of independent identical motors = 4

The failure rate of each motor, λ = 0.002 failures per hour

Given that in order for the system to work, at least one of the motors must operate, therefore, the system are in parallel

The Mean Time to Failure for a parallel system of four identical components is given as follows;

[tex]MTTF = \dfrac{1 }{\lambda} \times \left (1 + \dfrac{1}{2} + \dfrac{1}{3} + \dfrac{1}{4} \right)[/tex]

Which gives;

[tex]MTTF = \dfrac{1 }{0.002} \times \left (1 + \dfrac{1}{2} + \dfrac{1}{3} + \dfrac{1}{4} \right) = 1,041.\bar 6[/tex]

The system's Mean Time to Failure = 1,041.[tex]\bar 6[/tex] hours.

Answer:

ocean wave

Explanation:

ocean waves are not a wavelength but produced from the pull of the moons gravitational pull

Answer:

Amy's speed is 2/3 faster than Bill's

Explanation:

can't believe you don't know how to do this.

Answer:

30 meters/day.

Explanation:

Glacial motion can be fast up to 30 meters/day or slow up to 0.5 m/year on small glaciers moving the impact on local landforms. If the glacial motion goes up to 30 meters/day, more fast change occurs in the local landforms while on the other hand, if the glacial motion goes up to 0.5 m/year, very slow change occurs in the local landforms. So glacial motion has a direct affect on the changes occurs in the local landforms.

Answer:

Explanation:

The momentum of an object can be found by using the formula

momentum = mass × velocity

From the question we have

momentum = 50 × 20

We have the final answer as

Hope this helps you

Answer:

Yes it is balanced

Explanation:

Because 10-10= a net force of 0N

Its equal (balanced)

Answer:

The velocity of the pin will be 6.26 m/s in the right direction.

Explanation:

Let's use the momentum conservation equation.

[tex]p_{i}=p_{f}[/tex]

Initially, we have:

[tex]p_{i}=m_{b}*v_{ib}[/tex]

Where:

Now, the final momentum will be:

[tex]p_{f}=m_{b}*v_{fb}+m_{p}*v_{fp}[/tex]

Where:

Then, using the equation of the conservation we have:

[tex]m_{b}*v_{ib}=m_{b}*v_{fb}+m_{p}*v_{fp}[/tex]

[tex]6*3.5=6*2.77+0.7*v_{fp}[/tex]

[tex]6*3.5=6*2.77+0.7*v_{fp}[/tex]

[tex]v_{fp}=6.26 m/s[/tex]

Therefore the velocity of the pin will be 6.26 m/s in the right direction.

I hope it helps you!

Answer:

Increase

Explanation:

Kinetic energy is the energy of motion--so the overall energy of that object would increase. Kinetic energy of an object is directly proportional to the square of its speed.

Answer:

Explanation:

Firstly, it should noted that liquid contains particles that move free in space (but not as free as gases). When heat is applied to a liquid. The liquid begins to have an increase in thermal energy which would cause the movement of particles of the liquid to increase. As the thermal energy increases, the movement of the particles continues to increase which would eventually lead to the space of the particles in the liquid increasing. When it eventually gets to a point (of increased thermal energy, the liquid begins to boil and at this point, the liquid changes to gas.

Based on the explanation above, the flow chart in the picture above should be arranged as follows

The liquid gains thermal energy

                         ↓

The particles of liquid move faster

                          ↓

The space between the liquid particles increases

                           ↓

The liquid changes to a gas

Answer:

44.8 m/s

Explanation:

Use the Initial Speed Formula:

InS = 2(d/t) - Final Speed

InS = 2(55/1,25) - 43.2

InS = 2.44 - 43,2

InS = 88 - 43,2

InS = 44.8 m/s

Answer:

it will pop

Explanation:

Answer:

true

Explanation:

the object instead of moving through a distance can have zero displacement. Example: If an object travels from point A and reaches to the same point A, then its displacement is zero.

Answer:

It would be False :)

Explanation:

Hope this helps Have a blessed day! :)

Answer:wavelength of the electromagnetic waves=0.125 m

Explanation:

The wavelength of an electromagnetic wave is given as

λ = c/f

where λ=wavelength =??

 c= Speed =300 000 000 m/s

f =frequency=2 400 000 000 Hz

Wavelength =Speed /frequency

=300 000 000 m/s / 2 400 000 000 Hz

=300 000 000 m/s / 2 400 000 000 s⁻¹

=0.125 m

Answer:

Option (3)

Explanation:

From the graph attached,

Zeros of the function are, x = -3,

Graph of the polynomial touches x axis at x = -3, 1 and 3

Therefore, equation of the given function will be in the form of,

P(x) = [tex]k(x+3)^a(x-1)^b(x-3)^c[/tex]

Since, graph of the function just touches the x-axis, multiplicity of zero at x = -3 will be even and crosses x-axis so the multiplicity at x = 1 and 3 will be odd.

Therefore, possible function will be,

P(x) = [tex]k(x+3)^2(x-1)(x-3)[/tex]

Since, y-intercept of the function is at (0, -3),

P(0) = k(0 + 3)²(0 - 1)(0 - 3)

-3 = 27k

k = [tex]-\frac{3}{27}=-\frac{1}{9}[/tex]

Therefore, given polynomial function is,

P(x) = [tex]-\frac{1}{9}(x+3)^{2}(x-1)(x-3)[/tex]

Option (3) will be the correct option.

Answer:

A, C, and D

Explanation:

Just did the quiz

The three characteristics that make iron a good blackbody radiator are :

A blackbody radiator is an object which absorbs all the electromagnetic radiation at varying frequencies and angles of incidence. blackbody radiators posses a cavity which does not allow heat to escape from the radiator.

Hence we can conclude that the three characteristics that make iron a good blackbody radiator are as listed above.

Learn more about Blackbody radiator : https://brainly.com/question/16448055

#SPJ2

Complete Question

Force of 92 N is exerted horizontally on an 18 kg box of books, initially at rest , 7.6 m across a floor . The coefficient of kinetic friction between the floor and the box is 0.35. Find the net work done on the box.

Answer:

The value is  [tex]W_{net} = 230 \ J[/tex]

Explanation:

From the question we are told that

     The force exerted is  [tex]F = 92 \ N[/tex]

      The mass of the box is  [tex]m = 18 \ kg[/tex]

       The coefficient of kinetic friction is  [tex]\mu_k = 0.35[/tex]

        The distance covered is  [tex]d = 7.6 \ m[/tex]

Generally net workdone is mathematically represented as

      [tex]W_{net} = F_{net} * d[/tex]

Here  [tex]F_{net}[/tex] is the net force experienced by the box of books which is mathematically represented as

         [tex]F_{net} = F - \mu_k * m * g[/tex]

=>       [tex]F_{net} = 30.26 \ N[/tex]

So

             [tex]W_{net} = 30.26 * 7.6[/tex]

=>          [tex]W_{net} = 230 \ J[/tex]

The radio waves and digital signals will store and transmit through the electromagnetic wave.

EM waves are another name for electromagnetic waves. Electromagnetic radiations are made up of electromagnetic waves created when an electric field collides with a magnetic field.

Electromagnetic waves may alternatively be defined as the combination of oscillating electric and magnetic fields. Maxwell's equations are solutions to electromagnetic waves.

Electromagnetic waves are employed to transfer digital and analogue signals. The music you listen to or the graphics you see on a screen are created by changes in frequency and amplitude.

Hence, electromagnetic waves are used to transfer digital and analogue signals.

To learn more about the electromagnetic wave, refer to the link;

https://brainly.com/question/8553652

#SPJ2

Answer:

0.3937008

Explanation:

Answer: 1 centimeter is your answer

I apoligize that this is a late answer , I stumbled upon this post. Good luck to any future veiwers. P.S the picture below is for a similiar question for other students who pressed this post

Answer:

hope this helps D.

Explanation:

Mechanical energy may not be conserved when nonconservative forces act. For example, when a car is brought to a stop by friction on level ground, it loses kinetic energy, which is dissipated as thermal energy, reducing its mechanical energy.

A when you are in outer space since there is no gravity the mechanical energy just continues to push the direction it was pointed to  

Answer: the displacement is 50 meters.

Explanation:

We can assume that the initial position of both animals is the same, let's find the position equation for each one of them.

Impala:

We know that its velocity is 10m/s

then the velocity equation is

Vi(t) = 10m/s

For the position equation, we need to integrate over time to get:

Pi(t) = 10m/s*t + C

Where C is the constant of integration and represents the initial position of the impala.

For the Tiger, we know that the acceleration is 4m/s^2, then the acceleration equation is:

At(t) = 4m/s^2

The velocity equation can be found by integrating over time, we get:

Vt(t) = (4m/s^2)*t + V0

Where V0 is a constant of integration and represents the initial velocity of the tiger, we knew that the tiger was at rest, then the initial velocity is zero, and the velocity equation is:

V(t) = (4m/s^2)*t

For the position equation of the tiger we need to integrate over time again, and because both animals have the same initial position, the constant of integration will be equal to C.

Pt(t) = (1/2)*(4m/s^2)*t^2 + C

The tiger will catch the impala when the position of the tiger is the same as the position of the impala, then we need to solve:

Pi(t) = Pt(t)

10m/s*t + C =  (1/2)*(4m/s^2)*t^2 + C

We can remove C in both sides to get:

10m/s*t =  (1/2)*(4m/s^2)*t^2

Now we can divide both sides by t, to get

10m/s = (1/2)*(4m/s^2)*t

10m/s = (2m/s^2)*t

(10m/s)/(2m/s^2) = t = 5s

The tigger runs for 5 seconds before catching the Impala, knowing this we can find the displacement of the tiger, wich will be the difference between the final position of the tiger, Pt(5s) and the initial position of the tiger Pt(0s)

Displacement =  (1/2)*(4m/s^2)*(5s)^2 + C - ((1/2)*(4m/s^2)*(0s)^2 + C)

                       =  (1/2)*(4m/s^2)*(5s)^2 = 50m

The displacement of the tigger is 50 meters.