Raghu studies in grade 6th. He wants a cricket bat to be made by a carpenter. He tells the
that the length of the bat should be 7 hand spans. The tall carpenter tells Raghu that it
will be ready by tomorrow. When Raghu went to collect the bat the next day, he was very
disappointed. Why? Was the bat longer or shorter than what Raghu expected? Give reason.
carpenter

The electron number cannot be used instead because electrons can be removed from or added to an atom (option C)

The element of an atom is determined by its proton count, while the electron count can exhibit variability. Take, for instance, a sodium atom, which encompasses 11 protons and 11 electrons. However, it has the capacity to relinquish one electron, transforming into a sodium ion housing only 10 electrons.

This occurs due to the relatively loose binding of electrons to the nucleus, enabling their removal through the influence of an electric field or alternative mechanisms.

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Voltage depends on the amount of resistance, current according to the Ohm's law, and, by definition, is the measurement of electrical pressure.

According to the Ohm's Law,  the current through a conductor between two points is directly proportional to the voltage across the two points.

Mathematically,

V ∝ I

V = IR

where, R is the resistance of the conductor and I is the current flowing in the conductor. So, the voltage depends on the amount of resistance and current.

Also, Voltage is the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light.

Hence All of the above option in the given question are true.

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The acceleration of Thomas is 0.233 m/s^2.

Acceleration is the rate of change of velocity. Thomas the Train chugs along at a velocity of 2 m/s.

Thomas needs to go faster so more coal is shoveled into his engine and he accelerates for 10 seconds until he is going 4.33 m/s.

We are to find the acceleration of Thomas.

The formula for acceleration is given as :

acceleration = (final velocity - initial velocity) / time

In the given problem, the initial velocity of Thomas, u = 2 m/s.

The final velocity of Thomas, v = 4.33 m/s The time for which Thomas accelerates, t = 10 s.

Therefore, the acceleration of Thomas will be given as:

a = (v - u) / ta = (4.33 - 2) / 10s => 2.33 / 10s => 0.233 m/s^2

Thus, the acceleration of Thomas is 0.233 m/s^2.

To summarize, the acceleration of Thomas is 0.233 m/s^2.

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Answer:

A. 46.15 ohms

B. 1248 W

C. 2.25×10⁶ J

Explanation:

A. Determination of the resistance.

Current (I) = 5.2 A

Voltage (V) = 240 V

Resistance (R) =?

From ohm's law,

V = IR

240 = 5.2 × R

Divide both side by 5.2

R = 240 / 5.2

R = 46.15 ohms

B. Determination of the power.

Current (I) = 5.2 A

Voltage (V) = 240 V

Power (P) =?

P = IV

P = 240 × 5.2

P = 1248 W

C. Determination of the energy.

Power (P) = 1248 W

Time (t) = 30 minutes

Energy (E) =?

Next, we shall convert 30 minutes to seconds. This can be obtained as follow:

1 min = 60 s

Therefore,

30 min = 30 min × 60 s / 1 min

30 min = 1800 s

Finally, we shall determine the energy. This can be obtained as illustrated below:

Power (P) = 1248 W

Time (t) = 1800 s

Energy (E) =?

E = Pt

E = 1248 × 1800

E = 2.25×10⁶ J

Answer:

The notable examples are metal bearings, with occasional lumps on the otherwise smooth surfaces catching against each other, and the flow of an electric

Conversions of Kinetic energy to and from potential energy in vacuum converts with very little loss. If you throw a rock up against gravity in a vacuum, that rock will reach a potential energy that is almost exactly equal to the initial kinetic energy. When the rock reaches its peak and comes back down, its kinetic energy will be almost exactly the same when it reaches the original altitude.

Weight of a body is defined as the force with which it is attached to the earth.

mass is the total quantity of matter present.

the weight of something is given as mass * acceleration

weight of an object is directly proportional to the mass of the object.  so, if mass doubles, weight will also double.

hope this helps :)

- jeron

The Tension of the string is going to be less when submerged in water by a value called the buoyancy force, so below in the attached file is explanation on how to calculate the apparent weight and density of the submerged object

Answer: 72200

Explanation:

First you must find the height for this is on an inclined hill using:

h=Lsin(angle) —> 28.0sin(11.0) = 5.34

Now you would just use the PE equation (mgh) because you are finding ME and when you starting from the top KE=0, showing that what ever answer you get from PE would equal the same for ME.

Using mgh:

m=1380

g=9.80

h=5.34

(1380)(9.8)(5.34)

=72218.16

*Rounding to the 3rd=72200

Hope this helps :)

Answer:

Therefore, the 10 kg mass should be placed at x = 5.7 m along the x-axis to achieve a center of mass located at y = 4.5 m.

Explanation:

To find the position along the x-axis where a 10 kg mass should be placed such that the center of mass is located at y = 4.5, we can use the formula for the center of mass:

x_cm = (m1 * x1 + m2 * x2) / (m1 + m2)

Here, m1 and x1 represent the mass and position of the 8 kg mass, respectively. m2 is the mass of the 10 kg mass, and we need to find x2, its position.

Given:

m1 = 8 kg

x1 = 3 m

x_cm = unknown (to be found)

m2 = 10 kg

y_cm = 4.5 m

Since the center of mass is at y = 4.5, we only need to consider the y-coordinate when calculating the center of mass position along the x-axis.

To solve for x2, we can rearrange the formula as follows:

x2 = (x_cm * (m1 + m2) - m1 * x1) / m2

Substituting the given values:

x2 = (x_cm * (8 kg + 10 kg) - 8 kg * 3 m) / 10 kg

Simplifying:

x2 = (x_cm * 18 kg - 24 kg*m) / 10 kg

Now, we can set the y-coordinate of the center of mass equal to 4.5 m and solve for x_cm:

4.5 m = (8 kg * 3 m + 10 kg * x2) / (8 kg + 10 kg)

Simplifying:

4.5 m = (24 kg + 10 kg * x2) / 18 kg

Multiplying both sides by 18 kg:

81 kg*m = 24 kg + 10 kg * x2

Subtracting 24 kg from both sides:

10 kg * x2 = 81 kg*m - 24 kg

Dividing both sides by 10 kg:

x2 = (81 kg*m - 24 kg) / 10 kg

Simplifying:

x2 = 8.1 m - 2.4 m

x2 = 5.7 m

(brainlest?) ples:(

Answer:

the 10 kg mass should be placed at x = -2.4 m to achieve a center of mass at y = 4.5 m.

Explanation:

To find the position along the x-axis where the 10 kg mass should be placed so that the center of mass is located at y = 4.5, we can use the principle of the center of mass.

The center of mass of a system is given by the equation:

x_cm = (m1x1 + m2x2) / (m1 + m2),

where x_cm is the x-coordinate of the center of mass, m1 and m2 are the masses, and x1 and x2 are the positions along the x-axis.

Given:

m1 = 8 kg,

x1 = 3 m,

m2 = 10 kg,

y_cm = 4.5 m.

To solve for x2, we need to find the x-coordinate of the center of mass (x_cm) by using the y-coordinate:

y_cm = (m1y1 + m2y2) / (m1 + m2),

where y1 and y2 are the positions along the y-axis.

Rearranging the equation and substituting the given values:

4.5 = (83 + 10y2) / (8 + 10).

Simplifying the equation:

4.5 = (24 + 10*y2) / 18.

Multiplying both sides by 18:

81 = 24 + 10*y2.

Rearranging the equation:

10*y2 = 81 - 24,

10*y2 = 57.

Dividing both sides by 10:

y2 = 5.7.

Therefore, the y-coordinate of the 10 kg mass should be 5.7 m.

To find the x-coordinate of the 10 kg mass, we can use the equation for the center of mass:

x_cm = (m1x1 + m2x2) / (m1 + m2).

Substituting the given values:

x_cm = (83 + 10x2) / (8 + 10).

Since the center of mass is at x_cm = 0 (the origin), we can solve for x2:

0 = (83 + 10x2) / (8 + 10).

Rearranging the equation:

83 + 10x2 = 0.

24 + 10*x2 = 0.

10*x2 = -24.

Dividing both sides by 10:

x2 = -2.4.

Based on the information provided, it is likely that the figure shows an alternating current (AC). The arrows under the electrons pointing right and left, both towards and away from the light bulb, indicate that the direction of the electron flow is changing periodically. This is a characteristic of alternating current, where the flow of electric charge reverses direction periodically, typically in a sinusoidal manner.

In an AC circuit, the voltage also changes direction periodically, which is consistent with the changing direction of the electron flow shown in the figure.

In an alternating current, the flow of electrons periodically reverses direction, causing the current to switch between positive and negative values. This is different from direct current (DC), where electrons flow in a single, constant direction.

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Angle of deviation can be defined as the angle between the incident ray and the emergent ray when light passes through a prism.

When speaking of Angle of deviations, the incident ray is the ray of light that hitss the prism, while the emergent ray is the ray of light that emerges from the prism.

The angle of deviation is noted to be always greater than zero, and it can be used to calculate the refractive index of the prism.

The angle of deviation can be calculated using δ = i + r - A

δ is the angle of deviation

i is the angle of incidence

r is the angle of refraction

A is the angle of the prism

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The US city that regularly experiences the worst levels of photochemical smog that is enhanced by thermal inversions is Los Angeles.

Photochemical smog is a type of smog that is formed when pollutants in the air react with sunlight. It can cause health problems such as respiratory issues, eye irritation, and headaches.Thermal inversion occurs when a layer of warm air traps pollutants near the ground, preventing them from dispersing.

This can exacerbate the effects of photochemical smog.Los Angeles is known for its high levels of air pollution, including photochemical smog.

The combination of heavy traffic, industrial activity, and the surrounding mountains that trap pollutants in the area can contribute to the city's poor air quality. Additionally, the city's warm, sunny climate can create conditions that enhance the effects of photochemical smog.

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Answer:

F=w=ma                                                                                                                                                       OR by using equations of motions                                                                               vf=vi-at                    : a=vf-vi/t                                                              eq 1                         s=vit+1/2at squre                                                                                 eq 2                     2as=vf squre - vi squre                                                                        eq 3                                                                                                                                                                                  

Explanation:

where m is the mass of falling body , f is the weight is the force acting down ward , vf is the final velocity, vi is the inetial velocity , t is the time and s is the distance covered by a body.

The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.

The p-waves travel with a constant velocity of 7 km/s

The time can be calculated by using the formula

t = d / v

where

T1 =  10:05 a.m

d is the distance they take to travel from the epicenter

v is the speed of the p-waves

On average, the speed of p-waves is

v = 7 km/s

d = 5600 km (given)

Substituting the values in the formula;

t = d / v

t = 5600 ÷ 7

t = 800 seconds

Converting into minutes,

t = 800 ÷ 60

t = 13.3

≈ 13 mins

T1 -  13 mins = T2

10:05 - 13 mins = 9.52 am

It means the earthquake occurred prior 13 minutes, that is at 9.52 am.

Therefore, the earthquake occurred at 9.52 am.

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The average power developed by a diesel engine of a 400-Mg train increases the train's speed uniformly from rest to 10 m/s in 100 s along a horizontal track = 200 kW.

The first kinematic equation is v=v0+at , where v is the final velocity, v0 is the initial velocity, a is the constant acceleration, and t is the time

According to given information:

v = 10, v0= 0 , t= 100s, m=400

v=v0+at

10= 0+a(100)  

a= 0.1 m/s²

∑ F =ma  <==>  F= 400(10 ³ )(0.1) = 40(10 ³)N

Pavg = F. Vavg = 40(10 ³)(10/2) = 200 kW

It represents the typical quantity of work completed or energy converted per unit of time. When the context clearly indicates it, the average power is frequently referred to as "power".

The instantaneous power overrides the average power as time interval t gets closer to zero.

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Answer:

This happens when the mass of one of the objects is very large and does not move.

Explanation:

Answer:

d is the awnser

Explanation:

MABY?!??

Using what has been learned about research methods, some of the limitations of Freud’s theory of personality are

This is further explained below.

Generally, Id, ego, and superego, according to Freud, make up the three parts of the mind, and interactions and conflicts between these parts are what provide personality (Freud, 1923/1949).

The id, according to Freudian thought, is the psychological trait that serves as the foundation for our most primal instincts.

In conclusion,

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Answer:

   F = 303,615 10⁻¹¹ N

Explanation:

Let's analyze this problem a little, problem we are asked to find the attractive force of the large sphere and a small sphere, we can find separately the attractive force between the full large sphere and the small sphere, Let's call this force F1 and on the other hand the force is between a sphere representing the gap and the small sphere, let's call this outside F2, the net bone force of the large sphere with gap is the subtraction of these two forces.

             F = F₁ -F₂

Let's start by finding the force of the sphere of complete

           F₁ = G M₁ m / r²

the masses of the sphere is M = 388 kg and the distance is r = d = 14m

           F₁ = 6.67 10⁻¹¹ 380 27/14²

           F₁ = 356.50 10⁻¹¹ N

Now let's calculate the mass of the gap if large sphere

let's use the concept of density

          ρ = m / V

the volume of the gap is

        V = 4/3 π r³

For the radius of the hole they tell us that it touches one side and the center of the sphere, therefore its diameter is the radius of the large sphere

        d = 2.3 m

        r_hole = 1.15 m

        V_hole = 4/3 π r³

        V_hole = 4/3 π 1.15³

        V_hole = 6.37 m³

let's look at the density of the large sphere

         ρ = m / V

          V = 4/3 π r³

           V = 4/3 π 2.3³

           V = 50,965 m³

           ρ = 388 / 50,965

           ρ = 7.613 kg / m³

this is the density of the sphere without the gap

the mass of the gap is

         m_hole = ρ V

         m_hole = 7,613  6.37

         m_hole = 48.49 kg

the distance from the hole to the small building

        r₂ = d - r_hueco

        r₂ = 14 - 1.15

        r₂ = 12.85 m

the strength of this is

        F₂ = 6.67 10⁻¹¹ 48.49 27 / 12.85²

        F₂ = 52,885 10⁻¹¹ N

The strength of the sphere with the gap is

          F = F₁ -F₂

          F = (356.50 - 52,885) 10⁻¹¹

          F = 303,615 10⁻¹¹ N

The surface of the hollow passes through the center of the sphere and “touches” the right side of the sphere, the hollowed-out lead sphere attracts the small sphere with a gravitational force of approximately 2.84 × \(10^{-9\) N.

We may use Newton's law of universal gravitation, which states that the force of gravity between two objects is given by: to calculate the gravitational force the hollowed-out lead spherical exerts on the smaller sphere.

\(F = (G * m_1 * m_2) / r^2\)

V = (4/3) * π * \(R^3\)

The volume of the hollowed-out portion ( \(V_{hollow\)) is then:

\(V_{hollow\) = (1/2) * (4/3) * π * R^3 = (2/3) * π * \(R^3\)

Mass of the remaining lead sphere = M - (2/3) * M = (1/3) * M

F = \((G * m_1 * m_2) / r^2\)

F = (G * [(1/3) * M] * m) / \(d^2\)

Substituting the given values:

F = (6.674 × \(d^2 N m^2/kg^2\) * [(1/3) * 388 kg] * 27 kg) / \((14 m)^2\)

F ≈ 2.84 × \(10^{-9\)N

Thus, the hollowed-out lead sphere attracts the small sphere with a gravitational force of approximately  2.84 × \(10^{-9\)N.

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Answer:

Every mass

Explanation:

Because Force of gravity always act toward the center of the earth , so when an object is thrown up ,the force of gravity will act in opposite direction of motion ,that's toward the center of earth. The force is towards the center of the Earth (more or less). which gives it time get touch every mass.

The gravitational force of attraction exists between every objects in the universe that are having mass. So, the correct option is A.

Force of gravity is defined as the force of attraction experienced by bodies due to the gravitational field of earth.

Here,

The gravitational force is the attractive force experienced by any body that have mass. Gravity is an attractive force such that every bodies that are having mass in the earth are being attracted towards the centre of earth.

The equation of gravitational force is given by,

F = GMm/r²

where G is the gravitational constant of earth, M is the mass of earth and m is the mass of the body which is being attracted towards earth's centre, and r is the distance between earth and the body.

From the equation, it is shown that gravitational force is proportional to the masses. More the mass of the objects, more will be the gravitational force of attraction existing between them.

Hence,

The gravitational force of attraction exists between every objects in the universe that are having mass.

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With 20 windings, the generator will produce a higher EMF and, consequently, a larger current. This increased current will provide more power to the light bulb, resulting in a brighter illumination compared to the dim illumination observed with only 5 windings.

When you increase the number of wire windings in the generator from 5 to 20, the effect on the light bulb will be a brighter illumination. The brightness of the light bulb is directly proportional to the number of windings in the generator.

By increasing the number of windings, you are increasing the amount of wire wrapped around the magnet. This results in a higher number of turns per unit length, leading to an increased magnetic flux passing through the wire coils.

According to Faraday's law of electromagnetic induction, a change in magnetic flux induces an electromotive force (EMF) in a conductor, which in this case is the copper wire. The induced EMF causes electric current to flow through the wire, creating a flow of electrons.

The 30-W light bulb requires a certain amount of electrical power to produce its specified brightness. With 20 windings, the generator will produce a higher EMF and, consequently, a larger current. This increased current will provide more power to the light bulb, resulting in a brighter illumination compared to the dim illumination observed with only 5 windings.

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Explanation:

The resistance of a material is given by the formula as follows :

\(R=\rho \dfrac{L}{A}\)

Here,

\(\rho\) = resistivity of a material

L is the length of the material

A is the area of cross section of the material

So, the factors on which the resistance of a material depends are :

Length and area of cross section

The most common type of music which will be accompanied by a kitten will be slow, legato, and minor key.

Music heals the brain and soul. It should listen at the time of stress. There are different types of music such as slow, fast, and retro music.

When the person is feeling very happy and energetic they usually listen to fast songs. When a person is lost he usually listens slow and Legato music.

In the disco usually fast and upbeat music is played. Algerado is a type of quick and lively music.

Therefore, The most common type of music which will be accompanied by a kitten will be slow, legato, and minor key.

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Answer:

Personality or share the same interest similar in age or hobby

Explanation:

Answer:

Explanation:

People will form relationships with others who are similar in background, attitude and lifestyle.

Answer: Height of object = 29.13475

Hope this helps!

Answer: 29.12 Meters.

Explanation:

Answer: The focal length of the lens = 3.32 cm.

Explanation:

Lens formula : \(\dfrac1f=\dfrac1v-\dfrac1u\)    (i)

f= focal length , v=image distance , u =object distance.

magnification: m = \(\dfrac{v}{u}\)   (ii )

Given: v= -12.8 cm , m =2.85

Put values in (ii), we get

\(2.85=\dfrac{-12.8}{u}\\\\\Rightarrow\ u=\dfrac{-12.8}{2.85}\\\\\Rightarrow\ u=-4.49\ cm\)

substitute values of u , v in (i)

\(\dfrac1f=\dfrac1{-12.8}-\dfrac{1}{4.49}\\\\\Rightarrow\dfrac1f=-0.30084214922\\\\\Rightarrow\ f=\dfrac{-1}{-0.30084214922}\approx3.32\ cm\)

Hence, the focal length of the lens = 3.32 cm.

Answer:

6.92

Explanation:

2.85=-(-12.8/x)

do=4.49

1/f= 1/4.49 + 1/-12.8

f=6.92

Answer:

To find the net charge on the sphere using electric flux, we can use the formula:  

Φ = Q/ε0

Where Φ is the electric flux, Q is the charge, and ε0 is the permittivity of free space.  

Given that the electric field 20 cm from the center of the sphere is N/C and points radially inwards, we can use the formula for electric field due to a charged sphere to find the charge on the sphere:

E = kQ/r^2  

Where E is the electric field, k is Coulomb's constant, Q is the charge, and r is the distance from the center of the sphere.  

Substituting the given values, we get:  

20 = (1/4πε0)(Q)/(0.2)^2  

Solving for Q, we get:  

Q = (20)(0.2)^2(4πε0)  

Q = 0.64πε0 C  

Now, substituting this value of Q in the formula for electric flux, we get:  Φ = Q/ε0 = (0.64πε0)/(ε0) = 0.64π C  

Therefore, the net charge on the sphere is 0.64π C.

Answer:

Distance: 21km

Displacement: ~16.76km

A tennis ball is hit by a large force so that it goes up into the air and then it comes back straight down because of gravity.

We know that objects move upward due to application of force on it while on the other hand, object comes to the ground because of the attraction of earth which we called gravity.

So we can conclude that a tennis ball is hit by a large force so that it goes up into the air and then it comes back straight down because of gravity.

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Answer:

8 newtons

Explanation:

Balanced forces have an equal amount of newtons. 5+3=8, so the other team will need 8 newtons.

In a tug of war contest, one person pulls with a force of 5 Newtons. Another person on the same team pulls with a force of 3 Newtons. In order for the force of the rope to be balanced,force would the other team need to be pulling with is 8 newtons.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

A resultant force vector is described as a single vector that has the same consequence as several other vectors taken together.To create the resulting force vector, two vectors facing the opposite direction are subtracted from one another. Here Net Force = 5 - (-3) = 8 N

In order for the force of the rope to be balanced, force would the other team need to be pulling with is 8 Newtons.

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