A body with an initial velocity of 8 m/s moves along a straight line with constant acceleration and travels 640m in 40 seconds. For the 40s interval, find the (a) final velocity and (b) acceleration.

The resultant pH= 4.95

A weak acid solution and a conjugate base solution can be combined to create a buffer.

Strong acid or strong base addition does not result in a significant pH shift when a weak acid and conjugate base are present in the solution.

A buffer's pH can be determined using the Henderson-Hasselbalch equation:

pH = Pka + log [base] / [acid]

Let 0.05-x represent the amount of acetate in the buffer and x represent the amount of acetic acid in the buffer.

5.2 = 4.75 + log 0.05− x / x

0.05− x = 0.0369 M

HA = 0.0130 M × 800 mL+ 50 mL× 0.1 M = 15.47 mmol

A = 0.0369 M× 800 mL− 50 mL×0.1 M = 24.52 mmol

The new pH is:

pH= 4.75 + log 25.42 / 15.47

pH= 4.95

The resultant pH of the solution= 4.95

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The initial velocity of particle is 7.568 m/s

Given:

Acceleration = a = 6.14 m/s2

Time = t = 0.300 s.

final velocity = v = 9.41 m/s.

To Find:

initial velocity = u

Solution: Velocity is the prime indicator of the position as well as the rapidity of the object.

v = u + at

u = v - at = 9.41 - 6.14*0.3 = 7.568 m/s

Hence, initial velocity of particle is 7.568 m/s

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a. The risk of injury must be predictable.

b. A "breach of duty" is when a professional fails to uphold a level of care.

c. There must be a standard of care in place, and the practitioner must assume responsibility for the patient.

d. There must be a clear link between the treatment received and the harm.

Malpractice, commonly referred to as professional negligence, is defined as "an incident of carelessness or incompetence on the part of a professional" under tort law.

The following professionals might be the target of malpractice claims:

Medical professionals: If a doctor or other healthcare practitioner does not exercise the level of care and competence that a similarly situated professional in the same medical field would deliver under the circumstances, a medical malpractice claim may be made against them.

Lawyers: Failure to provide services with the amount of competence, care, and diligence that a reasonable lawyer would use in the same situation may be grounds for a legal malpractice claim.

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The speed of the bumblebee in kilometers per hour (km/h) is 55.08 Km/h

1 m/s = 3.6 Km/h

The following data were obtained from the question:

We can convert 15.3 m/s to Km/h as illustrated below:

1 m/s = 3.6 Km/h

Therefore,

15.3 m/s = (15.3 m/s × 3.6 Km/h) / 1 m/s

15.3 m/s = 55.08 Km/h

Thus, 15.3 m/s is equivalent to 55.08 Km/h. Therefore, we can say that the speed of the bumblebee in Km/h is 55.08 Km/h

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The constellation Scorpio will be visible in the year 10,000 A.D.

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By using ideal gas approximation, the final pressure is 9.6 atm.

We need to know about ideal gas to solve this problem. The ideal gas will follow the rule

P . V = n . R . T

where P is pressure, V is volume, n is the amount of substance, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

In the isochoric process where the initial and final volume is the same, the temperature and pressure will follow the rule

P1/T1 = P2/T2

where P1 is initial pressure, P2 is final pressure, T1 is initial temperature and T2 is final temperature. (Temperature in Kelvin)

From the question above, we know that:

P1 = 5.0 atm

T1 = 76°C = 349 K

T2 = 399°C = 672 K

By substituting the parameters, we get

P1/T1 = P2/T2

5.0/349 = P2/672

P2 = 9.6 atm

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65 mi/h would be the relative velocity between you and the truck.

Speed is the directional speed of an item moving as a sign of its pace of progress ready as seen from a specific casing of reference and as estimated by a specific norm of time. Speed is a principal idea in kinematics, the part of traditional mechanics that depicts the movement of bodies. It could sound convoluted, yet speed is fundamentally speeding in a particular course. It is a vector amount, and that implies we want both extent (speed) and bearing to characterize speed. The SI unit of it is meter each second (ms-1 ). In the event that there is a shift in extent or the course in the speed of a body the body is supposed to speed up.

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(a) The magnitude of →B is 2.43 km,

(b) The angle relative to due south is 56.7o in anti-clockwise direction.

© The magnitude of the →A−→B displacement is |→A−→B|=4.45 km

(d) The angle relative to due south is 326.7o in counterclockwise direction

326.7o

If there is a given vector →A then its opposite vector will be −→A

If the vector →A makes an angle θ above the positive x axis then the vector −→A will make the same angle below the negative x axis.

Given that:  

The first displacement vector is →A=−2.95 ^j km

The second displacement vector is →B=B^i

The magnitude of the resultant displacement is |→A+→B|=4.45 km

Let this resultant makes an angle θ above the positive x axis.

The resultant of the given vectors is,

→A+→B=−2.95 ^j km + B ^i (4.45 cos θ ^i+4.45 sin θ ^j) km

=−2.95 ^j km + B ^i

By comparing both sides, we get

(4.45 sin θ ^j) km

=−2.95 ^j km

⟹θ=−56.7∘

or 90∘−56.7∘= 33.3∘ with south.

and (4.45 cosθ ^i) km

=B ^i(4.45 cos (−33.3∘) ^i) km

=B ^i

B=2.43 km

The magnitude of →B

is 2.43 km

b.) The angle relative to due south is 56.7o in anti-clockwise direction.

The magnitude of the →A−→B

displacement is |→A−→B|=4.45 km

Let this resultant makes an angle αabove the positive x axis.

c.) The difference of the given vectors is,

→A−→B=−2.95 ^j km−B ^i(4.45 cosα ^i+4.45 sinα ^j) km

=−2.95 ^j km−B ^i

By comparing both sides, we get

(1.77 sinα ^j) km

=−1.32 ^j km

α=−56.7o

or 270∘+56.7∘=326.7o

with south.

and (4.45 cosα ^i) km

=−B ^i(4.45 cos(−56.7∘) ^i) km

=−B ^i

B=−2.43 km

The magnitude of →B

Is 2.43km

(d) Hence, the angle relative to due south is 326.7o in counterclockwise direction

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Work done is 158 joule

Given that, the force of a moving object is,

F = (8i - 6j + 9k) N

The object is moving from point (0,10,8) to the point (6,12,20)

Now we can calculate the displacement by the formula,

dr = (x2-x2)i + (y2 - Y2)j + (z2 - z2)k

Put all the values from the given values.

dr = (6 - 0)x + (12 - 10)j + (20 - 8)k

dr = (6i-2j+12k) meters

Now, the work done can be calculated as,

W = F.dr

W = (8i - 6j + 9k).(6i-2j+12k)

W = 158 J

Hence, work done is 158 joule

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The average rate of disappearance of i - between 1200.0s and 1600.0s

is 2.0 × 10⁻⁵ m/s.

To determine the slope of a graphed function, use the average rate of change formula. Divide the change in y-values by the change in x-values to determine the average rate of change.

The rate of disappearance for reactants is a positive (+) value. Because products are being made rather than disappearing, their rate of disappearance (-) is negative.

The average rate of reaction = Change in concentration

Time rate ( r ) = Δx Δt.

Sign of average rate of reaction: The average rate falls as the rate of reactant concentration increases.

There will be a bad response. The average rate of reaction will be positive as the rate of product concentration rises.

The average rate of disappearance of i - between 1200.0s and 1600.0s

is 2.0 × 10⁻⁵ m/s.

Therefore, the correct answer is option C) 2.0 × 10⁻⁵

The complete question is:

The peroxydisulfate ion (S₂O₈²⁻) reacts with the iodide ion in an aqueous solution via the reaction:

S₂O₈²⁻ (aq) + 3I⁻ → 2SO₄ (aq) + I₃⁻ (aq)

An aqueous solution containing 0.050 M of S₂O₈²⁻ ion and 0.072 M of I⁻ is prepared, and the progress of the reaction is followed by measuring [I⁻]. The data obtained are given in the table below.

Time (s) 0.000 - 400.0 - 800.0 - 1200.0 - 1600.0

[I⁻] (M) 0.072 - 0.057 - 0.046 - 0.037 - 0.029

The average rate of disappearance of I⁻ between 1200.0 s and 1600.0 s is ________ M/s.

A) 1.8 × 10⁻⁵

B) 1.2 × 10⁻⁵

C) 2.0 × 10⁻⁵

D) 5.0 × 10⁴

E) 1.6 × 10⁻⁴

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After moving, the two point charges are 6.36 cm apart.

We know that,

F = k [tex]q_{1} q_{2}[/tex] / [tex]r^{2}[/tex]

where,

[tex]q_{1} q_{2}[/tex] = two point charges

k = Coulombs constant

r = Distance between two charges

F = Electrostatic force between two charges

Given that,

r = 9 cm

F = k [tex]q_{1} q_{2}[/tex] / [tex]9^{2}[/tex]

[tex]F^{'}[/tex] = 2F

k [tex]q_{1} q_{2}[/tex] / [tex]r'^{2}[/tex] = 2 * k [tex]q_{1} q_{2}[/tex] / [tex]9^{2}[/tex]

[tex]r'^{2}[/tex] = 81 / 2 = 40.5

r' = 6.36 cm

Electrostatic force is the force between two point charges. It can either be positive or negative. If negative the forces are attractive and if positive the forces are repulsive in nature.

Therefore, after moving, the two point charges are 6.36 cm apart.

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All bulbs in the circuit go out happen to the bulb if we had one cell and one light bulb in a series circuit.

A series circuit consists of a channel via each component where the entire current flows. In a parallel circuit, the branches divide the current so that only a portion of it passes through each branch.

A circuit is referred to as a series circuit when all of the devices are linked in series. Each component of a series circuit is connected in such a way that only one channel for charge to travel via the external circuit is possible.

"A circuit with the components arranged in a straight line, so that all the current goes through each component in turn," is the definition of a simple series circuit.

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When the position of a block in simple harmonic motion on a spring is zero, acceleration of the block is also zero.

Position of a block performing simple harmonic oscillation is given by

[tex]x(t) = ASin(wt - \phi)[/tex]  where, '[tex]A[/tex]' , '[tex]w[/tex]' and '[tex]\phi[/tex]' are the amplitude, angular velocity and phase difference of the particle performing simple harmonic oscillation. Substituting time [tex]t = \frac{1}{w} + \phi[/tex] in the [tex]x(t) = ASin(wt - \phi)[/tex] we get position of the block to be zero. This implies the position of the block is zero at time [tex]t = \frac{1}{w} + \phi[/tex].

Now, the acceleration is the second derivative of position w.r.t time, thus, [tex]a(t) = -w^{2}ASin(wt - \phi)[/tex] is the acceleration of the block. Now, the acceleration of the block at time [tex]t = \frac{1}{w} + \phi[/tex] becomes zero.

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According to the research, the correct option is Aerobic exercise can last continuously for many minutes. It is the statement that correctly he can use to make in his description about aerobic exercise.

They are those physical activities that aim to burn fat using a high amount of oxygen.

In this sense, these exercises allow to improve the resistance of the person, they are not very intense but are developed in long periods, unlike anaerobic exercises that are more intense and brief.

Therefore, we can conclude that according to the research, the correct option is Aerobic exercise can last continuously for many minutes. It is the statement that correctly he can use to make in his description about aerobic exercise.

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Answer: Aerobic exercise can last continuously for many minutes.

Explanation:

Got it correct

Answer:

The answer is January. Your welcome

Explanation:

Two common stars are observed by an astronomer. It turns out that the first one is twice as hot as the second. This indicates that the first emits around 16 times as much energy as the second.

Astronomers are specialists in the field of astronomy, which is the study of celestial bodies and phenomena. They use various methods to explore and understand space beyond Earth, including using telescopes, satellites, and mathematical models.

They also compile data on different astronomical objects into comprehensive databases that can be used by researchers all over the world. This helps us to better understand our universe and how it works. Additionally, astronomers work towards developing new technologies that will help us probe further into space. As we continue to learn more about our galaxy and its many inhabitants, astronomers have a significant role to play in informing society about these discoveries.

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Answer:

Explanation:

0 m/s^2 is the answer

Answer:

Zero

Explanation:

Constant speed involves zero acceleration  ( which is a change in speed)

The force of collision with the ground will change by a factor of 4

The formula for momentum shows an inverse relationship between force and time, in other words, force varies inversely as time. Hence, if the time of collision between the brick and the ground is increased by a factor of four, the force of collision is with the ground changes by a factor of four. In this case, the resulting force reduces by a factor of four. Momentum is defined as the product of the mass of an object with the changes in the velocity of the same object per time.

F=m(v-u)/t

Where F= momentum

v= final velocity

u= initial velocity

t = time taken

The earth diameter is about 3 and 2 thirds times the diameter of the moon. what is the angular diameter of the earth seen by an observer on the moon?

We calculate the angular diameter of the Earth using the equation:

a=arctanD/d

where a is the angular diameter, D is the physical diameter of the Earth, and d is the distance from the Moon to the Earth.

The equatorial radius of the Earth is rE=6378.1km, the diameter is therefore

D=2×rE=12756.2.

   The mean distance to the Moon is d=384399km. This gives a (mean) angular diameter of a=1.90065°.

At Perigee the distance is d=362,600km. This gives an angular diameter of a=2.01482°

At Apogee the distance is d=405,400km. This gives an angular diameter of a=1.80226°

These Moon-Earth distances are as seen from the centre of the Moon. To calculate the diameter from the surface of the Moon, to subtract the position of the observer along the Moon-Earth axis.

If the observer is on the Moon's equator and the Earth is at zero-hour angle, the distance to the Earth needs to be subtracted by rM=1738.14km. Thus, we have;

 The mean distance to the Moon is d=384399−1738=382661km, giving an angular diameter of a=1.90928°.

At Perigee the distance is d=362600−1738=360862km. We have an angular diameter of a=2.02452°

At Apogee the distance is d=405400−1738=403662km. We have an angular diameter of a=1.81001°

The angular diameter of the Earth from the surface of the Moon is, therefore, between a=1.80226° (at apogee and the Earth is near the horizon) and a=2.02452° (at perigee and for an observer at the equator and when the Earth is at maximum altitude on the meridian).

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1.549×10-19lJ is the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from =7 to =1.

The equation E= hcE =hc, where h is Planck's constant and c is the speed of light, describes the inverse relationship between a photon's energy (E) and the wavelength of light ().

The Rydberg formula is used to determine the energy change.

Rydberg's original formula used wavelengths, but we may rewrite it using units of energy instead. The result is the following.

aaΔE=R(1n2f−1n2i) aa

were

2.17810-18lJ is the Rydberg constant.

The initial and ultimate energy levels are ni and nf.

As a change of pace from

n=5 to n=3 gives us

ΔE

=2.178×10-18lJ (132−152)

=2.178×10-18lJ (19−125)

=2.178×10-18lJ×25 - 9/25×9

=2.178×10-18lJ×16/225

=1.549×10-19lJ

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The ways of transferring thermal energy are Conduction, Convection and Radiation.

Heat transfer is the movement of molecules from a region of higher temperature to a lower temperature. It can be done in three ways:

Conduction is the heat transfer done through direct contact between two bodies. Convection is the heat transfer done by movement of fluids such as water or air. Radiation is the heat transfer done by electromagnetic waves.

Therefore, the ways of transferring thermal energy are Conduction, Convection and Radiation.

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Answer:

1.28E11 / 8.0E3 = 1.60E7 computers  (16,000,000 computers)

The efficiency of the machine is 83.3% when the output is 25 joules.

This can be defined as the ratio of the work output to the work input of a machine, expressed in percentage.

To calculate the efficiency of the machine we use the formula below.

Formula:

• E (%) = (Wo/Wi)100........... {Eq1}

Where:

• E (%) = Efficiency of the machine

• Wo = Work output

• Wi = Work input.

From the question,

Given:

Wo = 25 Joules

Wi = 30 Joules

Substitute these values into equation 1

We have,

• E (%) = (25/30)100

• E (%) = 83.3%

Hence, the efficiency of the machine is 83.3%.

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Answer:

Forces have magnitude and direction.

Explanation:

Force is a vector quantity.

The acceleration of the biker is 0.6 m s⁻².

Acceleration is the price of change in the velocity of an object with respect to time. Accelerations are vector quantities. The orientation of an object's acceleration is given through the orientation of the internet force performing on that item.

Acceleration is the name we deliver to any process where the speed changes. for the reason, that speed is a speed and a course, there are best methods so one can accelerate. Acceleration and Deceleration are one of the most essential subjects in the subject of science. Acceleration is the price of the converting of speed in any item, and deceleration refers to the price of acceleration,

forward force = 35 N

backward force = 20 N

Net force = 35 - 20

               = 15 N

we know that,

  force = mass × acceleration

      15 N = 25 kg × acceleration

Acceleration = 15/25

                       = 0.6 m s⁻²

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The participants whose reaction times are outliers are 242 and 868.

The mean/average value of the above values can be calculated by adding up all the values and dividing the result by 11.

Average Value = 242+483+486+491+494+500+505+506+507+868/11

The average/mean value comes out to be 505.

Thus, the reaction times which are far away from the average value of 505 are outliers.

Among the given values 242 and 868 are the only two values that deviate significantly from the average value as compared to other values.

Therefore, the participants whose reaction times are outliers are 242 and 868.

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At the pH of 4.24, both the concentration of clo- and hclo are equal.

The equal concentration of clo- and hclo are 5.75 x [tex]10^{-5}[/tex] M

When chlorine dissolves in water, a weak acid called hypochlorous acid is created. This acid then partially dissociates to produce hypochlorite or ClO. Oxidizers and the main disinfectants in chlorine solutions are HClO and ClO.

It is impossible to extract HClO from these solutions because it equilibrates with chlorine very quickly.

Many commercial bleaches, deodorants, and disinfectants contain the related chemicals sodium hypochlorite (NaClO) and calcium hypochlorite (Ca(ClO)2) due to their potent antibacterial qualities.

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The linear density of iron along [110] and [111] directions are

[tex]LD(100) = 2.851 nm^{-1[/tex]

[tex]LD(111) = 1.646 nm^{-1}[/tex]

Linear Density = No of atom centered on the direction vector / Length of direction vector.

[tex]LD(100) = \frac{1 atom}{2R\sqrt{2} }\\LD(111) = \frac{1 atom}{2R\sqrt{6} }[/tex]

[tex]R = 0.124 nm[/tex]

So, it becomes,

[tex]LD(100) = \frac{1}{2 * 0.124 \sqrt{2} } \\= > 2.851 nm^{-1}[/tex]

[tex]LD(111) = \frac{1}{2 * 0.124\sqrt{6} } \\ = > 1.646 nm^{-1}[/tex]

Hence, the linear density of iron 110 is 2.851nm⁻¹ and the linear density of iron 111 is 1.646nm⁻¹.

If a material has a non-uniform cross section, the linear mass density is a constant term that allows us to calculate the mass of the material at any given length between x = 0 and x = L. The cgs unit is g/cm whereas the SI unit for linear mass density is kg/m.

The linear density of the string and the tension in the string both affect how quickly a wave moves along a string. A string's linear density is its mass per unit length. In general, a wave's speed is determined by the square root of the medium's elastic property to inertial property ratio.

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The answer is 4.96 * 10⁻¹⁹ kg m / s

Proton is an elementary particle that is identical to the nucleus of the hydrogen atom, along with the neutron is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron, and has a mass of 1.673 × 10−27 kilogram

nonrelativistic equation for the magnitude of the momentum of the proton is p = m * v

Then: p = m * v

Then Let's calculate its value

            After that p = 1.67 * 10⁻²⁷ * 0.99 * 3 * 10⁸

            Now, p = 4.96 * 10⁻¹⁹ kg m / s

hence the answer is 4.96 * 10⁻¹⁹ kg m / s

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A point on a standing wave that is always stationary is an antinode.

An antinode is the location where constructive interference of the incoming and reflected waves creates the maximum amplitude of the wave.

Antinodes are points on a stationary wave that oscillate with maximum amplitude.

Nodes are points of zero amplitude and appear to be fixed.

Thus, a point on a standing wave that is always stationary is an antinode.

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