3- The velocity-time graph below shows the motion of a
ball in free fall. What is the acceleration of the ball from
0.5 to 0.7 seconds? Show your work:

125M far does it travel during this time interval.

The ball slows down halfway through and reaches zero velocity at the top. The ball's acceleration is the same throughout the throw. Towards Earth, he is 9.8 m/s2. The direction of travel of the ball remains upwards. The average velocity is a scalar, so the answer does not include a direction.

Projectile instantaneous velocity at maximum altitude is zero. Gravity gives the ball the same acceleration-deceleration when it rises as it does when it descends and accelerates so the time to reach the maximum height is the same as the time to return to the starting position. increase. Acceleration is zero if there is no change in the object's velocity. at the highest point.

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The maximum kinetic energy of the electrons knocked out of a thin copper foil by Compton scattering of an incident beam of 17.5 keV X-rays is 14.4 keV.

Kinetic energy is the energy of motion. It is the energy possessed by an object due to its motion. The kinetic energy of an object is directly proportional to the mass of the object and the square of its velocity. The formula for kinetic energy is KE = 1/2 mv2, where m is the mass of the object and v is its velocity. Kinetic energy has many applications in engineering, physics, astronomy, and other sciences.

This is calculated using the equation for the Compton effect, which states that the maximum energy of the scattered electron is equal to the incident photon energy minus the reduced rest energy of a single electron (511 keV). Thus, the maximum kinetic energy of the electron is 17.5 keV - 511 keV = 14.4 keV.

In this case, the work function is assumed to be negligible. The work function is the minimum energy required to remove an electron from a solid surface, and is usually taken into account when calculating the maximum kinetic energy of electron emission. However, since the work function of copper is relatively small (around 4.7 eV), it is not necessary to include it in this calculation.

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Answer:

3a. 240 C

3b. 3666.67 A

Explanation:

3a. Determination of the charge.

Current (I) = 2 A

Time (t) = 120 s

Charge (Q) =?

The charge, current and time are related by the following equation:

Charge (Q) = current (I) × time (t)

Q = It

With the above formula, we can obtain the charge as follow:

Current (I) = 2 A

Time (t) = 120 s

Charge (Q) =?

Q = It

Q = 2 × 120

Q = 240 C

Thus, the charge is 240 C

3b. Determination of the current

We'll begin by converting 220 KC to C. This can be obtained as follow:

1 KC = 1000 C

Therefore,

220 KC = 220 KC × 1000 C / 1 KC

220 KC = 220000 C

Next, we shall express 1 minute in second. This is shown below:

1 min = 60 s

Finally, we shall determine the current. This can be obtained as follow:

Charge (Q) = 220000 C

Time (t) = 60 s

Current (I) =?

Q = It

220000 = I × 60

Divide both side by 60

I = 220000 / 60

I = 3666.67 A

Thus, the current flowing through the bulb is 3666.67 A

The force needed to break another wire of the same length and material but twice the diameter is 200N.

Because the wires are made of the same material, their modulus of elasticity must be the same.

As a result, the ratio of longitudinal stress to longitudinal strain (Young's Modulus of Elasticity) must be the same. Now, the strains in both wires must be the same before they break.

Therefore,

stress = Young's modulus × strain,

both wires must be the same.

Because the second wire has a diameter twice that of the first, its area of cross section is four times that of the first. As a result, in order to generate the same stress, the force applied to the second wire must be four times that applied to the first wire.(since stress = force/cross section area).

Thus, the force required to break the second wire is 4200=800N.

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Answer:

D

Explanation:

because the slope decreases

Answer:

Should be D the correct answer

Explanation:

Solving for d using the calculated values for t, we find that the distance from spacecraft at which spacecraft should turn on its rockets is approximately 8670.7 meters.

To determine the distance from spacecraft at which spacecraft should turn on its rockets, we need to consider the motion of each spacecraft as it slows down.

Let's call the time elapsed from the moment spacecraft turns on its rockets until it comes to a complete stop t1. The initial velocity of spacecraft is 154.5 m/s and it slows down at a rate of 17.1 m/s^2, so its velocity after time t1 is given by:

v1 = 154.5 m/s - 17.1 m/s^2 * t1

The distance traveled by spacecraft during this time can be calculated as:

d1 = 154.5 m/s * t1 - (1/2) * 17.1 m/s^2 * t1^2

Next, let's call the time elapsed from the moment spacecraft turns on its rockets until it comes to a complete stop t2. The initial velocity of spacecraft is 133.0 m/s and it slows down at a rate of 22.2 m/s^2, so its velocity after time t2 is given by:

v2 = 133.0 m/s - 22.2 m/s^2 * t2

The distance traveled by spacecraft during this time can be calculated as:

d2 = 133.0 m/s * t2 - (1/2) * 22.2 m/s^2 * t2^2

Since the two spacecraft are moving towards each other, their relative velocity is the sum of their initial velocities:

v_rel = 154.5 m/s + 133.0 m/s = 287.5 m/s

The time elapsed until they meet, have zero relative velocity, and arrive at the same time, t, can be calculated as:

t = v_rel / (17.1 m/s^2 + 22.2 m/s^2)

The distance traveled by each spacecraft during this time can be calculated using the equations for velocity and distance given above. The total distance between the two spacecraft when they meet is the sum of these distances, so the distance from spacecraft at which spacecraft should turn on its rockets is given by:

d = d1 + d2 = (154.5 m/s * t - (1/2) * 17.1 m/s^2 * t^2) + (133.0 m/s * t - (1/2) * 22.2 m/s^2 * t^2)

Solving for d using the calculated values for t, we find that the distance from spacecraft at which spacecraft should turn on its rockets is approximately 8670.7 meters.

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Answer:  Density is measured in kg⋅m−2 . This means that it is derived from fundamental units which are the kilogram and metre. ... hence the kilogram and the metre are SI units and density is a derived unit from these units

Explanation:

they are calculated from the base units mass and length. Density is one derived unit; force, area, volume, specific volume and mass fraction are also derived units. Each derived unit is defined by a quantity equation.

Answer:

Density is obtained through mathematical manipulation.

Explanation:

A derived unit is obtained through mathematical calculation and the result is written with the S.I unit kg/m³

The angular velocity of the pointed rim of a rotating wheel if, The angular position of a point on the rim of a rotating wheel is given by θ = 4.0 t - 3.0 t² + t³, is 4 rad/ sec.

The rotation rate, which refers to how quickly an item rotates or circles in relation to another point, is measured pictorially by angular velocity. Angular velocity can be defined as the speed at which an item rotates or revolves around an axis.

Given:

θ = 4.0 t - 3.0 t² + t³

Calculate the angular velocity by differentiating the position function as shown below,

dθ / dt = d (4.0 t - 3.0 t² + t³) / dt

V = 4.0 - 6t + 3t²   (Change in position is equal to velocity)

Put the value of time, t = 2

V = 4 - 6 × 2 + 3 × 2²

V = 4 - 12 + 3 × 4

V = 4 - 12 + 12

V = 4 rad/sec

Thus, the angular velocity is 4 rad/sec.

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The correct terms that fills the box are;

(i) The incident ray

(ii) The normal

(iii) The reflected ray

(iv) The angle of incident

(v) The reflected angle

The terms of the ray diagram is illustrated as follows;

(i) This arrow indicates the incident ray, which is known as the incoming ray.

(ii) This arrow indicates the normal, a perpendicular line to the plane of incidence.

(iii) This arrow indicates the reflected ray; the out going arrow.

(iv) This the angle of incident or incident angle.

(v) This is the reflected angle or angle of reflection.

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The impulse delivered to the ball by the floor is approximately 13.4 kg⋅m/s  using the height.

1. Calculate the initial velocity of the ball just before it hits the floor using the height it falls from (20.0 m):
  - Use the equation: v² = u² + 2as, where v is the final velocity, u is the initial velocity (0 m/s), a is the acceleration due to gravity (9.81 m/s²), and s is the height (20.0 m).
  - Solve for v: v² = 0² + 2(9.81)(20.0) => v ≈ 19.8 m/s (downward).

2. Calculate the final velocity of the ball just after it rebounds using the height it rebounds to (15.5 m):
  - Use the same equation, v² = u² + 2as, with u = 0 m/s, a = 9.81 m/s², and s = 15.5 m.
  - Solve for v: v² = 0² + 2(9.81)(15.5) => v ≈ 17.4 m/s (upward).

3. Calculate the change in momentum of the ball, which is the impulse:
  - Impulse = mΔv = m(v_final - v_initial), where m is the mass of the ball (0.360 kg), v_final is the final velocity (17.4 m/s upward), and v_initial is the initial velocity (19.8 m/s downward).
  - Impulse = (0.360 kg)(17.4 + 19.8) = (0.360 kg)(37.2 m/s) ≈ 13.4 kg⋅m/s (upward).

So, the impulse delivered to the ball by the floor is approximately 13.4 kg⋅m/s.

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"A highly skilled" type of labor force might a pottery factory want to focus on when hiring. It is because skill and experience are crucial for a pottery factory.

Labor is a production force that refers to the work that people do to produce goods and services. It contains all physical and mental efforts expended in the production of goods and services.

Pottery is the process and products of shaping vessels and other objects out of clay and other ceramic materials and firing them at high temperatures to give them a hard and durable shape. In a pottery factory, a variety of techniques are required to form pottery. Therefore, a highly skilled labor is needed.

Skilled labor is defined as job that necessitates extensive training and experience. Skilled labor is frequently found in jobs requiring a high level of skill. In a pottery factory, for example, in throwing process. In throwing process, the wheel spins as a solid ball of soft clay is gently pressed, squeezed, and pulled upwards and outwards into a hollow shape. A skill and experience are needed to throw pots of an acceptable standard.

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Answer:

It allows you to see fetuses before they are born.

Explanation:

because it has many helpful measures....

it helps in breaking and crushing the kidney stones...due to its high frequency....

Answer:

the reaction is a physical reaction and it is exothermic as it releases heat to the sorrounding

Explanation:

because the mass of paper burnt is equal to the mass of products which are ashes

The two families of fundamental particles out of which all ordinary matter is made are leptons and quarks. Option b.

Leptons include particles such as electrons and neutrinos, which have no internal structure and are not affected by the strong nuclear force. Quarks, on the other hand, are the building blocks of protons and neutrons, and are affected by the strong force. Protons and neutrons are made up of different combinations of quarks, and photons are particles of light that are not considered to be fundamental particles, as they do not have any mass. Understanding the properties and interactions of these fundamental particles is essential to understanding the behavior of matter at the most fundamental level. Correct answer is option b.

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Answer:its D

Explanation: but i think u meant to put not in the question but if u did mean to put not then its A

Explanation:

electric kettle works so quickly is by using a relatively large electric current.

The amount of heat produced is proportional to the current squared,

so bigger currents produce much more

heat—and heat things much more

quickly—than smaller ones.

Water in an electric kettle boils much faster when compared to normal kettle mainly because of two reasons :-

(•) In normal kettle, heat is supplied directly onto the kettle's base. As it is cold in nature, it takes time for the kettle base to be heated and then only the heat passes through water.

On the other hand, in electric kettle, the electric current wave passes directly through the water, hence it takes less time to heat the water.

(•) Water is a good absorber of electric current, but is a poor absorber of heat. Consider if it takes 2 minutes for electric to pass through water, then it will take 9 minutes for the heat to pass through water.

It is due to these major reasons to why water boils faster in electric kettle than in normal kettle.

--------------------★---------------

If you have any doubts regarding the answer, feel free to ask it in comments !

Hope this answer's your query ...

The sun will become a red giant but it will not be a problem for humanity because the Earth will become inhabitable before that.

As per the research conducted it is said that the sun will eventually become a red giant and it engulf our planet Earth. The Earth will become extremely giant. This in turn will not become a problem for humanity, flora and fauna as the Earth will be completely inhabitable. All the forms of life will completely perish and no life form will exist. The planet will be engulfed by the red giant Sun. This is the reason it is not a problem for humanity.

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If the elliptical orbit of mercury were more eccentric, its precession rate would be larger than it is now.

Here's why mercury's orbit is most eccentric, Orbits of most planets are eccentric. Earth's orbit is slightly eccentric compared to mercury, because mercury is the closest planet to the sun, and not earth.

Why is Mercury orbit elliptical?

Orbits are caused by the planet's interactions with the sun as it moves around by the gravity of the sun.

What is the precession of Mercury?

The precession of Mercury's orbit is measured to be 5600 seconds of arc per century (one second of arc = 1/3600 degrees).

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To determine the number of half-lives that have elapsed, we need to compare the ratio of 14C to 14N atoms found in the hip bone fragment.

The ratio of 1 14C atom for every 31 14N atoms suggests that the hip bone fragment contains a smaller amount of 14C compared to the expected ratio found in a living organism. Since 14C undergoes radioactive decay with a half-life of approximately 5730 years, we can calculate the number of half-lives that have elapsed by observing how many times the ratio needs to double to reach the expected ratio.

In this case, if the expected ratio is 1:1, then the observed ratio of 1:31 would require five doublings to reach 1:1. Therefore, approximately five half-lives have elapsed since the death of the organism from which the hip bone fragment originated.

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When a new path of lesser resistance is made for an existing circuit a(n) short circuit occurs.

An electrical circuit short circuit is when two nodes that are supposed to be connected at different voltages make an improper connection. This leads to an electric current that can damage circuits, cause overheating, fire, or explosions, and is only constrained by the network's remaining nodes' equivalent Thevenin resistance. While short circuits are typically the result of a failure, they can occasionally be brought on purpose, such as when voltage-sensing crowbar circuit protectors are being installed.

An electrical connection that requires two nodes to have the same voltage is known as a short circuit in circuit analysis. Since there is no resistance and hence no voltage drop across the link in a "perfect" short circuit, there is no short circuit.

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Answer:

Explanation:

no

The statement that is true is B. There is an induced current in the wire ring directed in clockwise orientation.

It should be observed that as the current in the wire increases, so will the outward flux. Because the magnetic flux that is associated with the wire ring changes, an emf is induced in the wire ring.

The induced current in the wire ring will flow in a direction to lower the outward magnetic flux, according to Lenz law. The ring will also follow the right-hand palm rule. As a result, an induced current will flow through the wire ring in a clockwise direction.

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correct form of question

A circular metal ring is situated above a long straight wire, as shown in the figure. The straight wire has a current flowing to the right, and the current is increasing in time at a constant rate. Which statement is true?

a. There is no induced current in the wirering.

b. There is an induced current in the wire ring,directed in clockwise orientation.

c. There is an induced current in the wire ring,directed in a counterclockwise orientation

Answer:

fossil c

Explanation:

The reaction force at Q is 4N.

A support reaction is a force on a support or a resulting restraining end moment, which results due to a prevented possibility to move. In the case of structural systems, support reactions are in equilibrium with the external forces acting on the structure.

The uniformly distributed load can be replaced by a concentrated load acting at the centre of gravity of the UDL. The total load on beam is the UDL multiplied by the length of the beam,

So  support reaction is,

R = Load × Length

In this question,

The equation of equilibrium of moments is

\(R_{Q\) × 40 - Mg×20-  4N× 10 = 0

So, \(R_{Q\) = 10 N× 20 + 4N× 10 ÷ 40 = 4 N

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Answer:

True

Explanation:

To show that matrix A is diagonalizable, we need to demonstrate that there exists an invertible matrix P such that the diagonal matrix D is given by D = P^(-1)AP, where D represents the eigenvalues of A along its diagonal.

Given the matrix D =

```

1  6

0 -9

```

We can see that the eigenvalues of A are λ₁ = 1 and λ₂ = -9.

To find matrix P, we need to find the corresponding eigenvectors for each eigenvalue. Let's denote the eigenvector for λ₁ as v₁ and the eigenvector for λ₂ as v₂.

For λ₁ = 1, we solve the equation (A - λ₁I)v₁ = 0, where I is the identity matrix:

```

A - λ₁I =

1 -1  2

3 -5  0

(A - λ₁I)v₁ =

1 -1  2

3 -5  0  * v₁ = 0

This system of equations can be solved to find v₁ = [2, 1]ᵀ.

```

For λ₂ = -9, we solve the equation (A - λ₂I)v₂ = 0:

``

A - λ₂I =

1 -1  2

3 -5  0

(A - λ₂I)v₂ =

1 -1  2

3 -5  0  * v₂ = 0

This system of equations can be solved to find v₂ = [-1, 3]ᵀ.

``

Now that we have the eigenvectors v₁ and v₂, we can form matrix P using these vectors as columns:

```

P = [v₁, v₂] =

2 -1

1  3

```

Finally, we can calculate A^4 using the diagonalization method:

```

A^4 = (PDP^(-1))^4 = P D^4 P^(-1)

Since D is a diagonal matrix, we can simply raise each diagonal entry to the fourth power:

D^4 =

1^4  0

 0   (-9)^4

    =

1  0

0  6561

Therefore,

A^4 = P D^4 P^(-1) =

2 -1   *   1  0   *   2 -1

1  3       0  6561       1  3

       =

2 -1   *   2 -1   =   4 -2

1  3       1  3         5  7

```

Thus, A^4 is equal to the matrix

```

4 -2

5  7

```

This is the result obtained using the diagonalization method.

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a) The total resistance of the circuit in which three 45 ohm lightbulbs and three 75 ohm light bulbs connected in series is 360 ohm.

b) The total resistance of the circuit if all six are wired in parallel is 28.57 ohm.

a) In order to find the series total resistance, we need to add all resistances,

Req = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ = 45 + 45 + 45 + 75 + 75 + 75 = 135+ 225 = 360 ohm

b) Now, since the resistances are in parallel, we need to use the expression below,

1/Req = 1/R₁ + 1/R₂ + 1/R₃ + 1/R₄ + 1/R₅ + 1/R₆

Putting in the values,

1/Req = 1/45 + 1/45 + 1/45 + 1/75 + 1/75 + 1/75

1/Req = 1/0.035

Req = 28.57 ohm

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The net flux Φ and the net charge q enclosed by the four Gaussian surfaces are summarized as follows:

Surface S1: The net flux Φ is positive and the net charge q enclosed is positive.

Surface S2: The net flux Φ is negative and the net charge q enclosed is negative.

Surface S3: The net flux Φ is zero and the net charge q enclosed is zero.

Surface S4: The net flux Φ is positive and the net charge q enclosed is positive.

The introduction of an enormous charge Q up close to surface S4 will change the pattern of the field lines, but it will not change the net flux through the four Gaussian surfaces since the enclosed charge remains the same.

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Answer:

C

Explanation:

Am increase in velocity?

Answer:

change in mass is not acceleration