A special type of electro-
magnetic wave that has a
frequency which we can see:
T

Answer:

A

Explanation:

If the object is moving at a constant speed, the object isn't accelerating as the velocity doesn't change.

Answer: C.

Explanation:  plato users

The equilibrium condition allows finding the result for the tension in cable 3 of the system is:

               T₃ = 66.7 N

Given parameters

To find

Newton's second law gives the relationship between the force, the mass and the acceleration of the bodies, in the spatial case that the acceleration is zero, it is called the equilibrium condition.

           ∑ F = 0

Where F is the force.

The free body diagram is a diagram of the forces without the details of the bodies, in the attachment we see a free body diagram of each part of the system.

Let's apply the equilibrium condition to each body.

Cat

x-axis

         T₂ - T₁ cos θ₁ = 0

          T₂ = T₁ cos θ₁

y-axis  

        T₁ sin θ₁ - \(W_{cat}\) = 0

         T₁ sin θ₁ = \(W_[cat}\)

Dog

x-axis

       T₃ cos θ₃ - T₂ = 0

        T₂ = T₃ cos θ₃

y-axis

       T₃ sin θ₃ - \(W_{dog}\)= 0

       T₃ sin θ₃ te3 = \(W_{dog}\)

We look for the Tension of cable 2.

        T₂ = T₁ cos θ₁

        \(W_{cat}\) =T₁ sin θ₁

We solve.

        T₂ = \(W_{cat}\) cot θ₁

        T₂ = 2.0 9.8 cot 20

        T₂ = 53.85 N

We solve the dog equation.

           T₂ = T₃ cos θ₃

           \(W_{dog}\) = T₃ sin θ₃

We resolve

           \(\frac{W_{dog}}{T_2 } = tan \theta_3\)

            θ₃ = tan⁻¹  \(\frac{W_{dog}}{T_2}\)

            θ₃ = tan⁻¹ ( \(\frac{4.0 \ 9.8 }{53.85}\))

             θ₃ = 36º

Now we look for cable 3 tension.

           \(W_{dog}\) = T₃ sin θ₃

            T₃ = \(\frac{W_{dog}}{sin \theta_3}\)  

             T₃ = \(\frac{4.0 \ 9.8 }{sin 36}\)  

              T₃ = 66.7 N

In conclusion using the equilibrium condition we can find the tension in cable 3 is:

               T₃ = 66.7 N

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Sound waves are a type of mechanical wave that propagate through a medium, typically air but also other materials such as water or solids.

Frequency: the frequency of a sound wave refers to the number of cycles or vibrations it completes per second and is measured in Hertz (Hz).

Amplitude: the amplitude of a sound wave refers to the maximum displacement or intensity of the wave from its equilibrium position. It represents the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds and smaller amplitudes corresponding to softer sounds.

Wavelength: the wavelength of a sound wave is the distance between two consecutive points in the wave that are in phase, such as from one peak to the next or one trough to the next. It is inversely related to the frequency of the wave.

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Answer:

Conductivity, \(\sigma=500\ (\Omega-m)^{-1}\)

Explanation:

Given that,

The resistivity of a material, \(\rho=2\times 10^{-3}\ \Omega-m\)

We need to find the conductivity of the material.

We know that the reciprocal of resistivity is called conductivity.

\(\sigma=\dfrac{1}{\rho}\\\\\sigma=\dfrac{1}{2\times 10^{-3}}\\\\\sigma=500\ (\Omega-m)^{-1}\)

So, the conductivity of the material is \(500\ (\Omega-m)^{-1}\).

Answer:

the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.

Explanation:

Answer:

Antibiotics can only kill bacterial infections. they cant treat viruses because it's a viral infection that spreads through the body

They can't be used to treat infections caused by the Corona or any virus because antibiotics only kill bacterial infections. They can not treat Corona or any virus because it's a viral infection that spreads through out the body.

Answer:

Explanation:

In a standing wave function\(\psi (x,t) = A sin(kx)\) characterized for x between (0.a). on the off chance that the amplitude of the wave interchange from positive to negative at the interval. there probably been a node at \(x_0\), among 0 and a to such an extent that \(0<x_0 <a\). The reasoning is right that the likelihood of discovering the particle at the node \(x_0\) is 0 in light of the fact that by definition, the nodes of the wave are the place where the wave function falls and is equivalent to 0. Since the likelihood of discovering a particle at a position \(x_0\) at time \(t_0\), is provided by \(P=|\psi(x_0,t_0)|^2 dx\), this implies that at the nodes of a standing wave,

\(P = | \psi (x_0,t_0)|^2 \ dx \\ \\ P = |0|^2 dx \\ \\ P = 0\)

 So the reasoning that the likelihood of the particle being at \(x_0\) is 0 is right.  

However, to examine whether the particle can travel from a position  \(x <x_0\) to a position of \(x_0>x\). All together words, can the molecule be found on one or the other side of the node?

The appropriate response is yes.  

Recall that in quantum mechanics. wave functions at most present with the likelihood of discovering a particle at a specific time inside a time frame. The wave function doesn't present with an old classical actual trajectory that a particle should follow to go in space: all things being equal, it simply yields chances of whether a particle can be found in a specific spot at a specific time. So the reasoning that a particle can't get from a position \(x <x_0\) to a position of \(x>x_0\), is incorrect.

Answer:

Explanation:

F = k * q * lambda * R * π * (1 - √2/2)

Substituting the given values of q, lambda, R, and k, we get:

F = (9 x 10^9 N*m^2/C^2) * (20 x 10^-9 C) * (1 x 10^-6 C/m) * (0.1 m) * π * (1 - √2/2)

F ≈ 8.58 x 10^-4 N

Therefore, the force of interaction between the half ring and the point charge is approximately 8.58 x 10^-4 N.

Answer:

pretty sure its 6.2 x 10^-13

Explanation:

I looked it up I'm not a bigbrain but want to help

(C)

...........................

Answer:

Hope this helps!

Explanation:

Answer:

 (C) Mechanical Force

Explanation:

All the arrows align to point down when the South Pole of a magnet approaches it from the top. Therefore, the correct option is option A.

A section of a magnetic substance where the magnetization is uniformly oriented is called a magnetic domain. This indicates that the atoms' individual magnetic moments are lined up with one another and pointing in the same general direction.

The magnetization of such a sample of ferromagnetic spontaneously splits into several tiny areas known as magnetic domains when cooled under a temperature termed the Curie point. All the arrows align to point down when the South Pole of a magnet approaches it from the top

Therefore, the correct option is option A.

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Answer:

All the arrows align to point up. Option C.

Explanation:

Just got it wrong from the other answer and was shown the right answer.

Answer:  a = 28,8

Explanation:

\(F = ma\)

m = 24 , a = 12

\(F=ma\\\\F = 24 x12\\\\F=288\)

Same force :

m = 10

a = ?

F = 288

\(F = ma \\\\288 = 10xa \\\\28,8=a\)

Answer:

the power in both cases is the same.

Explanation:

hope helps you

thanksss

If a 5kg mass starts from rest at xo = -1 and moves under the action of a variable force F(x) = √1-x² to point xf = 1. Then the total work done by the force is equal to π/2 + 1.

To calculate the total work done by the force in this scenario, we can use the formula for work:

Work = ∫F(x) dx

where F(x) is the force as a function of position and dx represents an infinitesimal displacement.

In this case, the force is given by F(x) = √(1 - x²), and we need to find the total work done as the object moves from xo = -1 to xf = 1.

Let's break down the calculation step by step:

Write the integral for work:

Work = ∫F(x) dx

Substitute the given force:

Work = ∫√(1 - x²) dx

Integrate with respect to x:

To integrate the square root of (1 - x²), we use the trigonometric substitution. Let's substitute x = sin(θ) and dx = cos(θ) dθ.

Work = ∫√(1 - sin²(θ)) cos(θ) dθ

Simplify the integrand:

Using the trigonometric identity sin²(θ) + cos²(θ) = 1, we can rewrite the integrand as cos²(θ).

Work = ∫cos²(θ) dθ

Apply the power-reducing formula:

The power-reducing formula states that cos²(θ) = (1 + cos(2θ)) / 2. We can use this formula to simplify the integrand further.

Work = ∫(1 + cos(2θ))/2 dθ

Integrate the terms separately:

Work = (1/2) ∫dθ + (1/2) ∫cos(2θ) dθ

The first integral, ∫dθ, is simply θ, and the second integral, ∫cos(2θ) dθ, can be calculated as sin(2θ)/2.

Work = (1/2) θ + (1/2) (sin(2θ)/2) + C

Evaluate the integral limits:

To find the total work done, we need to evaluate the integral at the upper and lower limits of integration.

At xf = 1, the angle θ is π/2, and at xo = -1, the angle θ is -π/2.

Work = (1/2) (π/2) + (1/2) (sin(2(π/2))/2) - [(1/2) (-π/2) + (1/2) (sin(2(-π/2))/2)]

Simplifying further:

Work = π/4 + (1/2) - (-π/4 + (1/2))

Work = π/4 + 1/2 + π/4 + 1/2

Work = π/2 + 1

Therefore, the total work done by the force is equal to π/2 + 1.

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As the ionisation energy is the amount of energy required to remove the outermost electron from an atom.

With the increase in the atomic number, the number of shells are increasing. Due to which the distance between the outer electron and the nucleus is also increasing.

According to the coulomb's law,

where F is the force of attraction between the two charges.

In the case of atom,

Let F be the force of attraction between the outer most electron and nucleus.

d is the distance between the nucleus and outermost electron.

As the atomic number increases from helium to radon, the distance between the nucleus and the outermost electron is also increasing.

Thus, the force of attraction between the nucleus and electron decreases.

Hence, the ionisation energy required to remove the outermost electron from helium to radon is decreasing.

Answer:

the force of attraction between the two charges is 4.2 x 10⁹ N.

Explanation:

Given;

the magnitude of first charge, q₁ = 0.06 C

the magnitude of the second charge, q₂ = 0.07 C

distance between the two charges, r = 3 m

The force of attraction between the two charges is calculated as ;

\(F = \frac{Kq_1q_2}{r^2}\)

where;

k is Coulomb's constant = 9 x 10⁹ Nm²/C²

\(F = \frac{Kq_1q_2}{r^2} \\\\F = \frac{(9\times 10^9)(0.06)(0.07)}{3^2} \\\\F = 4.2 \times 10^{6} \ N\)

Therefore, the force of attraction between the two charges is 4.2 x 10⁹ N.

Answer:

B. contain hydrogen

C. clouds of gas and dust

E. needed to create a star

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.

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

Stars are typically made up of two (2) main hot gas, Hydrogen (H) and Helium (He). The chronological order in which the formation of a star occur are;

1. Gravity pulls gas and dust together to form dense cores.

2. A protostar forms as mass increases.

3. Nuclear fusion begins under high pressure.

Scientists have been able to understand and discover that, gravity pulled materials (low-density cloud of interstellar gas and dust known as a nebula) together forming the planetary bodies in our solar system.

A dark nebula can be defined as an interstellar cloud that is so dense as a result of high concentration of gas and dust and as such it obscures the visible wavelengths of light from stars behind it, thus appearing completely opaque (dark patch) in front of a bright emission nebula or in regions having plenty stars.

The characteristics of a nebulae are;

I. It contain hydrogen.

II. Clouds of gas and dust

III. It is needed to create a star.

Explanation:

a. To calculate the total distance traveled, we need to find the distance traveled during the first 30 minutes and the distance traveled during the next 20 minutes, and then add them up.

During the first 30 minutes:

distance = speed × time

distance = 916.66 m/min × 30 min

distance = 27,499.8 meters

During the next 20 minutes:

distance = speed × time

distance = 900 m/min × 20 min

distance = 18,000 meters

Total distance traveled:

distance = 27,499.8 meters + 18,000 meters

distance = 45,499.8 meters

Therefore, the total distance traveled is 45,499.8 meters.

b. To calculate the average speed, we need to divide the total distance traveled by the total time taken.

Total time taken:

time = 30 min + 20 min

time = 50 min

Average speed:

speed = distance ÷ time

speed = 45,499.8 meters ÷ 50 min

speed = 909.996 m/min

Therefore, the average speed is 909.996 m/min.

Answer:

\(E_0=0.173N/C\)

Explanation:

From the question we are told that:

Power \(P=50kw=>50*10^3w\)

Distance \(d=10km=10000m\)

Generally the equation for Intensity is mathematically given by

\(I=\frac{P}{4\pi d^2} w/m^2\)

\(I=\frac{50*10^3}{4 \pi 10000^2} w/m^2\)

\(I=3.98*10^{-5}w/m^2\)

Generally Intensity is also

\(I=\frac{1}{2}cE_0^2e\)

Where

\(e=8.854*10^{-12}Nm^2/c^2\)

Therefore

\(E_0=\sqrt{\frac{2I}{c *e}}\)

\(E_0=\sqrt{\frac{2*3.98*10^{-5}}{3*10^8 *8.854*10^{-12}}}\)

\(E_0=0.173N/C\)

Answer:

Ek1 = 900000 [J]

Ek1 = 400000 [J]

Explanation:

In order to solve this problem we must remember that kinetic energy is defined as the product of mass by velocity squared by a medium. Therefore using the following equation we have:

\(E_{k1}=\frac{1}{2}*m*v1^{2}\)

where:

m = mass = 500 [kg]

v1 = 60 [m/s]

So we have:

Ek1 = 0.5*500*(60^2)

Ek1 = 900000 [J]

and:

Ek2 = 0.5*500*(40^2)

Ek2 = 400000 [J]

Answer:

5.67 m/s

Explanation:

The speed of a wave can be calculated as the distance traveled by the wave divided by the time taken:

Speed = Distance/Time

In this case, the distance traveled by the wave is the length of the pool, which is 17 m. The time taken by the wave to travel this distance is 3 seconds.

So, the speed of the wave can be calculated as:

Speed = 17 m/3 s

Speed = 5.67 m/s

Therefore, the speed of the water wave in the 17 m long pool is 5.67 m/s.

The distance above the ground the rock should be raised in order to hits the ground double of initial time is 4h.

The given parameters;

The time of motion of the rock from the given height is calculated as;

\(h = ut + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt_0^2\\\\h = \frac{1}{2} gt_0^2\\\\t_0^2 = \frac{2h}{g} \\\\t_0 = \sqrt{\frac{2h}{g} }\)

When the time of motion is doubled to 2t₀, the height above the ground should be;

\(2(t_0) = 2(\sqrt{\frac{2h}{g} } )\\\\2(t_0) = \sqrt{\frac{4\times 2h}{g} }\)

Thus, the distance above the ground the rock should be raised in order to hits the ground double of initial time is 4h.

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a. There are two main types of pluralism: cultural and political

b. Yes, the United States is becoming more pluralistic

c. Ethnic enclaves can be both a positive and negative aspect of pluralism in the US.

a. Pluralism refers to the coexistence of multiple cultures, religions, and ethnicities within a society. There are two main types of pluralism: cultural and political. Cultural pluralism emphasizes the preservation of distinct cultural traditions, while political pluralism emphasizes the equal representation of different groups within the political system.

Cultural pluralism is often associated with the idea of multiculturalism, which recognizes and celebrates the diversity of different cultures. This type of pluralism acknowledges the importance of cultural differences and encourages individuals to maintain and express their cultural identities. In contrast, political pluralism emphasizes the importance of equal representation of different groups within the political system. This can take the form of proportional representation in government or equal access to political power for different groups.

b. The United States is becoming more pluralistic, as the population becomes more diverse and the importance of multiculturalism and political pluralism is increasingly recognized. The country is home to many different ethnic and cultural groups, and these groups are increasingly visible in politics and society. This is evident in the increasing number of ethnic and cultural enclaves, which are areas where different ethnic groups live in close proximity to one another.

c. Ethnic enclaves can be both a positive and negative aspect of pluralism in the US. On the one hand, they allow individuals to maintain their cultural traditions and create supportive communities. On the other hand, they can also lead to segregation and exclusion, as different groups may be reluctant to interact with one another. In order to promote a positive form of pluralism, it is important to encourage interaction and understanding between different groups, while also respecting and celebrating their distinct cultural identities.

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Answer:

Efficiency is simply output (useful) power divided by input power, with the difference being losses due to imperfections in design and other inevitabilities.

Explanation:

Answer:

i) angle of incidence;i = 29.43°

ii) δm = 38.92°

Explanation:

Prism is equilateral so angle of prism (A) = 60°

Refractive index of glass; n_glass = 1.52

A) Let's assume the incident angle = i and Critical angle = θc

We know that, sin θc = 1/n

Thus;

sin θc = 1/n_glass

θc = sin^(-1) (1/n_glass)

θc = sin^(-1) (1/1.52)

θc = 41.14°

Now, the angle of prism will be the sum of external angle that is critical angle and reflected angle.

Thus;

A = r + θc

r = A - θc

So;

r = 60° - 41. 14°

r = 18.86°

From, Snell's law. If we apply it to this question, we will have;

(sin i)/(sin r) = n_glass

Where;

i is angle of incidence and r is angle of reflection.

Let's make i the subject;

i = sin^(-1) (n_glass × sin r)

i = sin^(-1) (1.52 × sin 18.86)

i = sin^(-1) 0.4914

i = 29.43°

B) The formula to calculate minimum deviation would be from;

μ = [sin ((A + δm)/2)]/(sin A/2)

Where;

μ is Refractive index

δm is minimum angle of deviation

A is angle of prism

Now Refractive index is given by a formula; μ = (sin i)/(sin r)

So; μ = (sin 29.43)/(sin 18.86)

μ = 1.52

Thus;

1.52 = [sin ((60 + δm)/2)]/(sin 60/2)

1.52 * sin 30 = sin ((60 + δm)/2)

0.76 = sin ((60 + δm)/2)

sin^(-1) 0.76 = ((60 + δm)/2)

49.46 × 2 = (60 + δm)

98.92 - 60 = δm

δm = 38.92°

All the equations of motion are as follows, Displacement (s) equation, Final velocity (v) equation, Average velocity (v_avg) equation, Displacement (s) equation with average velocity, and Displacement (s) equation.

In terms of its motion as a function of time, equations of motion define how a physical system behaves. In more detail, the equations of motion define how a physical system behaves as a collection of mathematical functions expressed in terms of dynamic variables.

In conclusion, equations of motion define how a physical system behaves in terms of how its motion changes over time.

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The question is incomplete. Here is the complete question.

A baseball palyer hits a 5.1 oz baseball with an initial velocity of 140ft/sat an angle of 40° with the horizontal as shown. Determine

a) The kinetic energy of the ball immediately after it is hit

b) The kinetic energy of the ball when it reaches its maximum height

c) The maximum height above the ground reached by the ball.

Answer: a) KE = 131.64 J

              b) KE = 0

              c) h = 126 ft

Explanation: Kinetic energy is the energy an object posses due to its motion. It can be calculated as \(KE=\frac{1}{2}mv^{2}\)

a) Kinetic energy's unit is Joule. So, we have to transform ounce in kg and ft/s in m/s for the units to correspond:

m = 5.1(0.02835)

m = 0.1445 kg

v = 140 ft = 42.67 m/s

Then, kinetic energy is

\(KE=\frac{1}{2}(0.1445)(42.67)^{2}\)

KE = 131.64 J

Kinetic energy immediately after the ball is hit is 131.64 J.

b) At its maximum height, the ball has its highest potential energy. Because of the law of conservation of energy, when potential energy is maximum, kinetic energy is minimum and vice-versa. So, at the maximum height, kinetic energy is 0.

c) This type of motion is projectile motion. The maximum height on a projectile motion can be determined by

\(v_{y}^{2}=v_{0y}^{2}-2g\Delta y\)

When h is maximum, \(v_{y}=0\)

Velocity of the ball has an angle with the horizontal, so initial velocity at the y-axis is

\(v_{0y}=v_{0}sin(\theta)\)

Substituting and solving

\(v_{y}^{2}=v_{0}^{2}sin^{2}(\theta)-2gh\)

\(0=(42.67)^{2}sin^{2}(40)-2(9.8)h\)

\(19.6h=(42.67)^{2}(0.643)^{2}\)

\(h=\frac{(1820.73)(0.4132)}{19.6}\)

h = 38.4 m

Transforming into ft: h = 126 ft

The maximum height above the ground reached by hte ball is 126 feet.