what came first the chicken or the egg.

Measuring the distance from  \(I_1 \ to \ I_1'\) and dividing by 2 has advantage of achieving a more accurate result compared to measurement taking directly.

Measuring the distance from \(I_1 \ to \ I_1'\) is equivalent to the double of the distance.

This method of measurement gives a more accurate result because it minimizes error that may result from taking readings form the intervals. It ensures more accurate result compared to the measurement obtained when \(OI_1\) is measured directly.

\(OI_1 = \frac{I_1 + I_1'}{2}\)

Thus, we can conclude that measuring the distance from  \(I_1 \ to \ I_1'\) and dividing by 2 has advantage of achieving a more accurate result compared to measurement taking directly.

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The force needed to accelerate a mass of 40 kg from velocity v₁ = (4î - 5) + 3k)m/s to v = (8î + 3) - 5k)m/s in 10 seconds is 12.4 N.

Start by calculating the change in velocity (Δv) experienced by the object. This can be done by subtracting the initial velocity v₁ from the final velocity v.

Δv = v - v₁ = ((8î + 3) - 5k) - ((4î - 5) + 3k)

= 8î + 3 - 5k - 4î + 5 - 3k

= 4î - 8k + 8

Next, calculate the acceleration (a) using the formula:

a = Δv / t

where t is the time interval, given as 10 seconds.

a = (4î - 8k + 8) / 10

= (0.4î - 0.8k + 0.8) m/s²

The force (F) required to accelerate the object can be found using Newton's second law:

F = m * a

where m is the mass, given as 40 kg.

F = (40 kg) * (0.4î - 0.8k + 0.8) m/s²

= (16î - 32k + 32) N

Simplify the expression to obtain the final answer:

F = 16î - 32k + 32 N

≈ 12.4 N

Therefore, the force needed to accelerate a mass of 40 kg from velocity v₁ = (4î - 5) + 3k)m/s to v = (8î + 3) - 5k)m/s in 10 seconds is approximately 12.4 N.

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The CD player operates at 0.4V of electricity. Voltage, commonly referred to as electromotive force, is merely the amount of energy contained in one charge.

Equation:

An electrical circuit's source of energy imposes pressure known as voltage on charged electrons (current), causing them to flow through a conducting loop and perform tasks like lighting a lamp. Voltage is measured in volts and is simply equal to pressure (V).

The difference in electric potential between two places is what is referred to as voltage, in other words.  

CD player's current is 0.1 A.

4-volt resistance

Unknown:

Source Voltage =?

Solution:

based on the law of ohms;

V = voltage; V = I R

I stands for current.

R stands for resistance.

Plug in the parameters and solve for V = 0.1 x 4 V = 0.4V.

The CD player operates at 0.4V of electricity.

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Answer:

B. It was expensive.

Explanation:

Answer:

B. It was expensive.

Explanation:

The pressure of the tank, when filled with water at a depth of 6 m, is approximately 580.124 atmospheres (atm). To calculate the pressure of the tank, one can use the equation: Pressure (P) = Density (ρ) × g × Depth (h)

Pressure (P) = Density (ρ) × g × Depth (h)

Given: Density of water (ρ) = 1000 kg/m³

Acceleration due to gravity (g) = 9.8 m/s²

Depth (h) = 6 m

Using the given values, one can calculate the pressure:

Pressure = 1000 kg/m³ × 9.8 m/s² × 6 m Pressure

= 58800 kg·m⁻¹·s⁻²

Now, let's convert the units to pascals (Pa) using the conversion 1 atm = 1.013 x \(10^5\) Pa:

Pressure = 58800 kg·m⁻¹·s⁻² × (1 atm / 1.013 x\(10^5\) Pa)

Pressure = 580.124 atm

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The area οf the clοud that was struck by lightning had a negative charge, sο, οptiοn (d) is cοrrect.

The negatively charged atοm's electrοns are respοnsible fοr this. An atοm's tοtal negative charge, which is prοduced by all οf its electrοns, cοunteracts the pοsitive charge οf the prοtοns in the atοmic nucleus.

Prοtοns and electrοns, which functiοn as charge carriers, frequently carry bοth pοsitive and negative electric charges. By mοving charges, energy is prοduced. Charge—alsο referred tο as electric charge, electrical charge, οr electrοstatic charge—is a prοperty οf a unit οf matter in physics and is denοted by the letter q.

Therefοre, The area οf the clοud that was struck by lightning had a negative charge, sο, οptiοn (d) is cοrrect.

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Work done by gravity when it moves from A to C will be 288.6 joule

Applying conservation of energy between point A and B,

7.4xgx5.9 = 1/2x7.4xv2 + 7.4xgx3.2

873.2 = 7.4v2 + 473.6

v = 7.34 m/s

It should be noted that to find velocity at C, which has come down to a height of 2 meter, it means it has travelled by 5.9-2 =3.9 m

so, v2 = 2gh = 20x3.9 =

v = 8.83 m/s

Work done by gravity when it moves from A to C = mxgx(5.9-2) = 288.6 joule

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Answer:

The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. If you consider an object interacting with the Earth, this force is called the weight. The unit for weight is the Newton (same as for any other force).

Explanation:

Answer:the difference is weight is the force exerted from an object by gravity

Explanation:

And mass is how much “stuff” is in an object

B. The reactants have higher potential energy, and energy is absorbed is the statement that best describes the total energy change of the system.

The difference in the amounts of chemical energy that are stored in the products and reactants accounts for the energy change in a chemical reaction. Enthalpy refers to the system’s heat content or stored chemical energy.

Potential energy can be described as the energy which a body possess because of its position. The potential energy can also be said as stored energy. The energy diagram that shows the changes in energy is called as a chemical reaction.

Potential energy and the Reaction progress are shown in the problem and from this the reactants are seen as the substance which reacts and form one or more than one product.

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Answer:

120 v

Explanation:

The two resistors have an equivalent of    20 * 30 /(20+30) = 12 ohms

  10 amps of current in the circuit

v = ir

  = 10 * 12 = 120 volts

Here is another way:

The two resistors are in prallel so the voltae across both is the same

  use the one on the right      v = ir     =   4 x 30 = 120 v

Answer: Hope this helps!!!!

Explanation:

Answer:

Explanation:

We can use the equation for free fall motion to solve this problem:

h = (1/2)gt^2

where:

h = height from which the body started to fall (what we want to find)

g = acceleration due to gravity (9.8 m/s^2)

t = time taken to fall 10 meters (0.2 s)

First, we need to find the velocity of the body when it passes the lower point. Since the body is freely falling, it will have the same velocity as an object thrown vertically downward from rest at the height from which it started to fall (h). We can use the equation for final velocity in free fall to find this velocity:

vf^2 = vi^2 + 2gh

where:

vf = final velocity (which is the velocity when the body passes the lower point)

vi = initial velocity (which is zero)

g = acceleration due to gravity (9.8 m/s^2)

h = height from which the body started to fall (what we want to find)

Rearranging the equation and substituting the known values, we get:

vf = sqrt(2gh)

vf = sqrt(2 × 9.8 m/s^2 × h)

vf = sqrt(19.6h) m/s

Now we can use this velocity to find the time taken by the body to travel the 10-meter distance between the two points:

vf = gt

t = vf/g = sqrt(19.6h)/9.8 s

Finally, we can substitute this value of t into the equation for height and solve for h:

h = (1/2)gt^2 = (1/2) × 9.8 m/s^2 × (sqrt(19.6h)/9.8 s)^2

h = (1/2) × h

h = 5 meters

Therefore, the body started to fall from a height of 5 meters above the higher point.

The magnitude of the net force that is acting on particle q₃ is equal to 6.2 Newton.

Given the following data:

Charge = \(-2.35 \times 10^{-6}\) C.

Distance = 0.100 m.

Scientific data:

Coulomb's constant = \(8.988\times 10^9 \;Nm^2/C^2\)

In this scenario, the magnitude of the net force that is acting on particle q₃ is given by:

F₃ = F₁₃ + F₂₃

Mathematically, the electrostatic force between two (2) charges is given by this formula:

\(F = k\frac{q_1q_2}{r^2}\)

Where:

Note: d₁₃ = 2d₂₃ = 2(0.100) = 0.200 meter.

For electrostatic force (F₁₃);

\(F_{13} = 8.988\times 10^9 \times \frac{(-2.35 \times 10^{-6} \times [-2.35 \times 10^{-6}])}{0.200^2}\\\\F_{13} = \frac{0.0496}{0.04}\)

F₁₃ = 1.24 Newton.

For electrostatic force (F₂₃);

\(F_{13} = 8.988\times 10^9 \times \frac{(-2.35 \times 10^{-6} \times [-2.35 \times 10^{-6}])}{0.100^2}\\\\F_{13} = \frac{0.0496}{0.01}\)

F₂₃ = 4.96 Newton.

Therefore, the magnitude of the net force that is acting on particle q₃ is given by:

F₃ = 1.24 + 4.96

F₃ = 6.2 Newton.

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Answer:

6.2

Explanation:

acellus

The cost of operation for an A.C for 10 hours per day for a month will be 71,100 francs.

Power is the amount of energy transferred or converted per unit time. The unit of power is the watt, equal to one joule per second. Power is a scalar quantity.

Cost of operation for 10 hours a day;

Daily consumption = 3kW x 10 hours

Daily Consumption = 30kW

Since 1kWH = 79 francs;

Daily consumption amount = 30 x 79 francs

Daily consumption amount = 2,370 francs

Therefore, the monthly consumption (using 30days) will be;

2,370 francs x 30 = 71,100 francs

In conclusion, 71,100 francs will be spent in a month (30 days) to run the 3kW rated A.C for 10 hours a day at 1kWH.

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The ways in which a good psychologist views new and surprising conclusions of research studies are critical thinking and amiable skepticism.

A quality known as amiable scepticism combines openness to ideas and scientific findings with a wariness that arises when the concept is not supported by sound logic or evidence. You need to be a critical thinker if you want to be receptive to friendly scepticism.

The topic of critical thinking is complicated, and there are many multiple interpretations of what it means to analyse or evaluate verifiable facts in a reasonable, sceptical, and objective manner. The capacity to assess data and be conscious of prejudices or preconceptions, including your own, is referred to as critical thinking.

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The distance covered by bob from top to bottom is the half of the amplitude of motion of bob. Therefore, the amplitude of motion of bob is 17 cm/2=8.5 cm.

The bob completes one complete revolution in one second therefore, the time period of motion of bob is 1.0 s.

Answer:

1.4 m/s to the left

Explanation:

just took it c:

The amount of energy needed to boil away the water at the initial temperature  is 301,248 J.

The amount of energy needed to boil the water at the given is calculated as follows;

Q = mcΔθ

where;

density of water = 1000 g/L

mass = density x volume

mass of water = 1000 g/L x 1.6 L = 1,600 g

Q = 1600 g x 4.184 J/g⁰C x (100⁰C - 55 ⁰C)

Q = 301,248 J

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The absolute pressure at an ocean depth of 1.0 x 10^3 m is 1.002 x 10^8 Pa.

Hydrostatic pressure is the pressure that a fluid exerts on a surface due to the weight of the fluid above it. It is the result of the force of gravity acting on a column of fluid, and it is directly proportional to the height of the column of fluid and the density of the fluid.

The absolute pressure at an ocean depth of 1.0 x 10^3 m can be calculated using the hydrostatic pressure equation:

P = ρgh + Po

where:

P is the absolute pressure at the given depth

ρ is the density of the water

g is the acceleration due to gravity (assumed to be 9.81 m/s²)

h is the depth of the ocean

Po is the atmospheric pressure at the surface (assumed to be 1.01 x 10^5 Pa)

Substituting the given values, we get:

P = (1.025 x 10^3 kg/m³) x (9.81 m/s²) x (1.0 x 10^3 m) + 1.01 x 10^5 Pa

P = 1.025 x 9.81 x 10^6 Pa + 1.01 x 10^5 Pa

P = 1.002 x 10^8 Pa.

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Answer:

a

 \(\frac{dE}{dt} =- 2.72 *10^{15} \ N/C \cdot s\)

b

The  direction of the electric field is opposite that of the current              

Explanation:

From the question we are told that

   The current is  \(I = 17\ A\)

   The diameter of the ring is  \(d = 3.0 \ cm = 0.03 \ m\)

Generally the  radius is mathematically represented as

       \(r = \frac{d}{2}\)

       \(r = \frac{0.03}{2}\)

       \(r = 0.015 \ m\)

The  cross-sectional area is mathematically represented as

       \(A = \pi r^2\)

=>     \(A = 3.142 * (0.015^2)\)

=>    \(A = 7.07 *10^{-4 } \ m^ 2\)

Generally  according to ampere -Maxwell equation we have that

      \(\oint \= B \cdot \= ds = \mu_o I + \epsilon_o \mu _o\frac{ d \phi }{dt }\)

Now given that \(\= B = 0\) it implies that

     \(\oint \= B \cdot \= ds = 0\)

So

    \(\mu_o I + \epsilon_o \mu _o\frac{ d \phi }{dt } = 0\)

Where  \(\epsilon _o\) is the permittivity of free space with value \(\epsilon_o = 8.85*10^{-12 } \ m^{-3} \cdot kg^{-1}\cdot s^4 \cdot A^2\)

            \(\mu_o\) is the permeability of free space with value  

\(\mu_o = 4\pi * 10^{-7} N/A^2\)

      \(\phi\) is magnetic flux which is mathematically represented as

       \(\phi = E * A\)

Where E is the electric field strength

  So  

       \(\mu_o I + \epsilon_o \mu _o \frac{ d [EA] }{dt } = 0\)

=>   \(\frac{dE}{dt} =- \frac{I}{\epsilon_o * A }\)

=>   \(\frac{dE}{dt} =- \frac{17}{8.85*10^{-12} * 7.07*10^{-4} }\)

=>   \(\frac{dE}{dt} =- 2.72 *10^{15} \ N/C \cdot s\)

The  negative  sign shows that the  direction  of  the electric field is opposite that of the current

Answer:

convection currents

Explanation:

Grouping data refers to the process of categorizing or organizing data based on specific criteria or attributes.

It involves grouping similar data points together to gain a better understanding of patterns, relationships, and trends within the dataset. By grouping data, you can simplify complex information and derive meaningful insights from large amounts of data. The purpose of grouping data is to create subsets or clusters that share common characteristics.

This enables easier analysis, summarization, and comparison of data within each group. Grouping can be performed on various types of data, such as numerical, categorical, or time-based data. Grouping data allows for the exploration of data at different levels of granularity.

For example, you can group sales data by region to analyze regional performance, or group customer data by demographics to identify specific customer segments. This process helps in identifying outliers, detecting patterns, and making data-driven decisions.

Common techniques for grouping data include using functions like GROUP BY in SQL or utilizing data visualization tools to create charts or graphs that illustrate the grouped data. Grouping can be applied in various fields, such as marketing, finance, healthcare, and research, to uncover insights and support decision-making processes.

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Answer:

72 J

Explanation:

Use the Work formula

W= F x d

Given:

F - 48 N

d - 1.5 m

Solution:

W= F x d

W=  48 N x 1.5 m

W= 72 J

Answer:

it's from gravity because when you throw something up it goes forward a certain distance

Answer:

\(\boxed {\boxed {\sf 120 \ kg*m/s \ down \ the \ hill}}\)

Explanation:

Momentum is the quantity of motion of a moving object. It is the product of mass and velocity.

\(p=mv\)

The mass of the bike is 20 kilograms. The velocity is 6 meters per second.

\(p= 20 \ kg * 6 \ m/s\)  

Multiply.

\(p= 120 \ kg*m/s\)

Momentum is a vector quantity, so it has both magnitude and direction. The direction of the momentum is in the direction of the velocity. The velocity is down the hill, so the momentum is also down the hill.

The bike's momentum is 120 kg*m/s down the hill.

Explanation:

Newton's first law of motion states that every object will remain at rest or in uniform motion in a straight line unless acted upon by a net external force. In other words, when no net force acts on an object, the acceleration of the object is zero. Hence, the tendency of an object to resist any change in its velocity is known as inertia. 

In an inertial reference frame (frame of reference in which Newton's first law of motion is true), mass is defined as a quantitative measurement of the concept of inertia, where the larger the mass of an object, the greater the inertia of the object (greater tendency to resist change in the state of motion).

Additionally, Newton's second law of motion, in his work Philosophiae Naturalis Principia Mathematica (1687), was originally defined as the rate of change of the momentum of a particle is equivalent to the net force acting on the particle and is in the direction of the force. This can be expressed as the differential equation

                                                  \(\vec{F}_{net} \ = \ \displaystyle\frac{d\textit{\textbf{p}}}{dt}\).

But what is momentum?

We know that a moving object has momentum. This is the tendency of the object to keep moving in the same direction unless acted on by an external force (do not confuse this with the definition of inertia). Simply put, momentum can be imagined as the quantitative measure of how "unstoppable" is an object in motion.

Formally, momentum, \(\textbf{\textit{p}}\), is defined as the product of the mass of an object and its velocity.

                                                    \(\textbf{\textit{p}} \ = \ m\textbf{\textit{v}}\).

Following the mathematical definition of momentum, the differential equation shown above can the be rewritten to yield the modern definition of the second law of motion that we know today,

                                                  \(\vec{F}_{net} \ = \ \displaystyle\frac{d(m \ \times \ \textit{\textbf{v}})}{dt} \\ \\ \vec{F}_{net} \ = \ m\displaystyle\frac{d\textit{\textbf{v}}}{dt} \\ \\ \vec{F}_{net} \ = \ m\textit{\textbf{a}}\)

Notice that momentum does not just depend on the object's mass (scalar quantity), but also the velocity (vector quantity) of the object in which it is traveling. Hence, the momentum of an object is also dependent on its direction, implying that momentum changes when

To calculate the momentum of the bike, substitute the known quantities into the formula of momentum.

                                              \(\textbf{\textit{p}} \ = \ (20 \ \text{kg})(6 \ \text{m s}^{-1}) \\ \\ \textbf{\textit{p}} \ = \ 120 \ \text{kg m s}^{-1}\)

Answer:

Conduction

Explanation:

Conduction is when heat or electricity is transmitted throughout a substance.

The energy transfer taking place through our body is called conduction. Our body is conductive and which make the electrical shock.

There are three different modes of energy transfer namely, conduction, convection and radiation. Conduction is the energy transfer mode on solids and convection is taking place in gases and liquids.

Radiation is the energy transfer mode through vacuum. In conduction the energy transfers easily through the chain of  closely packed molecules. Whereas in convection, the molecule which obtained an energy travels across the space and transfers to other molecules.

Our body transfers energy inside through conduction process. Skin is very conductive and the electrons from the wire can be passed through our body that's why we gets electrically shocked.

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Speed = distance / time

Speed = (33 cm) / (2min 20sec)

Speed = (0.33 m) / (140 sec)

Speed = 0.0024 m/s

Speed = (0.0024 m/s) x (3600 sec / 1 hr) x (1 km / 1000 m)

Speed = (0.0024 x 3600 / 1000) (m-sec-km / sec-hr-m)

Speed = 0.0085 km/hr

For the time of 2 min and 20 seconds, Archie's speed in m/s will be 0.0024 m/s and Archie's speed in km/hr will be 0.0085 km/hr.

The "speed at which an object is traveling," or speed, is a scalar quantity. The speed of an object is the rate at which it moves through space. A fast-moving object covers a considerable distance in a short amount of time while traveling at a high speed. An object moving slowly, on the other hand, moves a comparatively modest distance in the same amount of time. An object with zero speed is one that is not moving at all.

According to the question, the given values are :

Distance, d = 33 inches or,

d = 33 cm

Time, t = 2 minutes 20 seconds, or,

t = 140 seconds.

Speed is the ratio of distance to time.

s = 33/140

s = 0.0024 m/s

Now the distance in km/hr will be :

s = 0.0024 m/s × 3600 sec / 1hr × 1 km/ 1000 m

s= 0.0085 km/hr

Hence, the speed in km/hr is 0.0085 km/hr and in m/s speed is 0.0024 m/s.

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The potential difference between points A and B in the circuit is 12 V.

To find the potential difference between points A and B in the given circuit, determine the total voltage across the circuit.

From the information provided, there are four resistors labeled as 12 Ω each. Assuming these resistors are connected in series, the total resistance in the circuit is 12 Ω + 12 Ω + 12 Ω + 12 Ω = 48 Ω.

Next, determine the current flowing through the circuit. The voltage is given as 24 V.

Using Ohm's Law (V = IR), calculate the current:

I = V / R

I = 24 V / 48 Ω

I = 0.5 A

Since the resistors are connected in series, the current remains the same throughout the circuit.

Finally, to find the potential difference between points A and B, multiply the current by the resistance between those points:

V_AB = I × R_AB

V_AB = 0.5 A * 24 Ω

V_AB = 12 V

Therefore, the potential difference between points A and B in the circuit is 12 V.

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Answer:

Impulse is defined as change in momentum of an object divided by time interval.

at t= 0s

initial velocity = u , initial momentum = mu

at some time t .

final velocity = V, final momentum= mv.

now, change in momentum= ( final - initial) = ( mv-mu)

time interval = (t-0) = t

impulse force = (mv-mu)/ ( t)

Ft = (mv-mu) proved .

this law is known as Newton's second law.

The head loss doubles when the average velocity is doubled.

The vector quantity velocity (v), denoted by equation v = s/t, quantifies dislocation (or shift in position, s), over change in time (t).

Velocity is the pace and direction of the an object's movement, whereas speed is the timekeeping at which an object is travelling along a path.In other words, velocity is a vector, whereas speed is indeed a scalar value.

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