PLEASE HELP!!!! A 0.5 kg football is moving at a velocity of
20 ms where it hits a receiver's hands who stops the ball in 0.075 seconds. What force did the receiver put on the ball?

Specific Resistance is a property of any conductive material, a figure used to calculate a conductor's end-to-end resistance. The specific resistance of materials is given in units of Ω-cmil/ft or Ω-meters (metric).

The electrical resistivity of a material is a fundamental property that measures how strongly it resists electric current. A material with a low resistivity allows electric current to flow easily. The Greek letter is commonly used to represent resistivity. The ohm-meter is the SI unit of electrical resistivity. When a known amount of voltage is applied, specific resistance is defined as the resistance offered per unit length and unit cross-sectional area. The following is the mathematical representation: ρ = R A L. Specific resistance is also referred to as resistance. A material's resistivity is defined as the resistance of a wire of that material with unit length and unit area of cross-section. Its SI unit is the ohm-metre.

Here,

Specific Resistance is a property of any conductive material, a figure used to determine a conductor's end-to-end resistance. Specific resistance for materials is measured in Ω-cmil/ft or Ω-meters (metric).

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Electromagnet is the type of magnet which is used in the coil in a relay.

Two or more electromagnets in the relay are energized by the relay coil. The static iron core is positioned between the electromagnet. The rotational magnetic field is produced by the coil that is wound on the electromagnet.

The activating or primary side of a relay is another synonym for the magnetic, coil system, or motor unit. It is made up of every part required to transform the electrical energy from the primary side into the mechanical force needed to open the contacts and switch the secondary circuit.

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Newton's second law, also known as the law of acceleration or the force law, states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass.

It means that the force applied to an object is equal to the product of its mass and acceleration.

In simple terms, it says that the more force applied to an object, the greater its acceleration will be, and the more massive an object is, the less it will accelerate for a given force.

This law is used to calculate the motion of objects under the influence of forces and is important in explaining the behavior of objects in motion. It can be represented mathematically as F = ma, where F is the net force acting on an object, m is the mass of the object and a is its acceleration.

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Cantilever beam capacitance at time t, expressed as C= U's rate of change is therefore inversely proportional to x 2.

Date Updated: 27 June 2022. (00 : 00) Solution: A capacitor's capacitance is determined by dividing the amount of charge on either of its conductor plates by the potential difference between its conductors.

QpropV or C=(Q)/(V). The coulomb per volt and farad is the SI unit for capacitance (F).

The fundamental equation for capacitors is charge (= capacitance x voltage, or Q = C x V. We gauge capacitance by series or in parallel, which is the capacity that holds one coulomb (specified as the charge delivered by one ampere inside one minute) of charge per one farad.

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The force that a magnet exerts on certain materials, including other magnets, is called magnetic force.

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Answer:

Torque is a measure of the force that can cause an object to rotate about an axis. Force is what causes an object to accelerate in linear kinematics, torque is what causes an object to acquire angular acceleration.

The frequency of the ultrasonic wave generated by a nickel rod of length 4 cm is 415 kHz.

Frequency is the number of times a phenomenon occurs within a given period of time. It is measured in hertz (Hz), which is equal to one occurrence per second. Frequency is used in a variety of fields, including sound, radio waves, light, and electricity. It is a measure of how often a certain event occurs, and it is often used to measure oscillations in a system. Frequency is an important concept in physics and mathematics, and it is used to calculate the speed of waves and the behavior of particles.

The frequency of an ultrasonic wave that can be generated by a nickel rod of length 4 cm can be calculated using the speed of sound in Nickel (V), Young’s Modulus (E) and density (ρ).

The speed of sound in Nickel (V) is calculated using the formula V = √(E/ρ).

Therefore, V = √((207 GPa)/(8900 kg/m³))

V = 3320 m/s

Now the frequency (f) of the ultrasonic wave generated can be calculated using the formula:

f = V/λ

where λ is the wavelength of the wave.

The wavelength (λ) is calculated using the formula:

λ = 2L

where L is the length of the rod.

Therefore, λ = 2*4 cm = 8 cm

Now, f = 3320 m/s/8 cm

f = 415 kHz.

Therefore, the frequency of the ultrasonic wave generated by a nickel rod of length 4 cm is 415 kHz.

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A flat piece of paper has a mass of 5 grams. When the paper is crumpled into a ball, the mass of the crumpled paper is D) the same as the flat paper.

Mass was first discovered by Sir Isaac Newton through research on the gravitational and inertial properties of objects he developed. Newton was an English physicist, mathematician, chemist, astronomer, natural philosopher, and theologian.

Mass can be interpreted as a measure of the number of particles contained in a substance or object. Mass is also one of the principal quantities that shows the size of the inertia of an object.

Mass becomes an intrinsic property of an object, so that wherever the object is, the mass value will remain the same. If it is based on the effect of the object on the direction of motion, mass is classified as a scalar quantity (only has value).

Mass has units in the International System , namely kilograms (kg). These units can be further reduced to grams (g), or milligrams (mg). Generally, mass is measured using a balance, for example a three-arm O'hauss balance, a digital balance, and a two-arm analytical balance.

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The loudest sound ever recorded was the Krakatia volcano eruption and its specific measurement is 194dB.

The loudest sound ever recorded was due to a volcanic eruption that occurred on an Indonesian island named Krakatoa. The eruption occurred on 27th August 1883. The explosion led to a tsunami with waves as high as 46m thereby causing almost two-thirds of the island to collapse. The height of the waves was so high that they could rock the ships as far as South Africa. At a sound as high as 194 dB, a complete vacuum is created as the energy in the waves of sound starts distorting. At this position the sound waves while moving start pushing the air rather than moving through the air. This pushing away of the air leads to formation of the pressurized wall of moving air.

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Answer: Yes it is true according o newton third law of motion

What is Newton Third Law of motion ?

--According to Newton's third law of motion, every action has an equal and opposite reaction.

--These two forces act on two different bodies.

-- Example,

1-  while swimming, you push the water backward. The water, in turn, pushes you forward.

--Similarly, while walking, you push the ground backward.

-- The ground then exerts a reaction force on you in the forward direction.

What is Newton Second Law of motion ?

--Newton's second law of motion states that “Force is equal to the rate of change of momentum.

--For a constant mass, force equals mass times acceleration.

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The slope of this situation is $2.00. This is because the cost of the delivery service increases by $2.00 for each 2 meals delivered. Therefore, the slope is $2.00 ($2.00/$2.00).

The term "increase" can refer to a variety of different concepts. Generally, it is defined as an increase in size, amount, number, or intensity. In the business world, an increase could refer to a rise in profits or revenue, a rise in stock prices, an increase in the number of employees, an increase in the amount of production, or an increase in the cost of goods or services. In the context of personal finance, an increase could refer to an increase in wages or an increase in the value of investments.

The slope of this situation is $2.00. This is because the cost of the delivery service increases by $2.00 for each 2 meals delivered.

Mathematically, the slope is calculated as the change in cost divided by the change in meals delivered. In this situation, the change in cost is $2.00 and the change in meals delivered is 2.

Therefore, the slope is $2.00 ($2.00/$2.00).

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The slope in this situation is 2.49$.

The amount is 4.98/2 meals delivered.

i.e. amount is 2.49$.

So, the slope in this situation is 2.49$.

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Here, a denotes acceleration, t denotes time, and u and v denote beginning and ultimate velocities, respectively. u = v + at.

       0 m/s = 45 m/s + 7 m/s t t = 6.42 s.

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The molar mass of a compound can be found by adding the molar masses of all of the atoms in the compound.

The molar mass of an atom can be found on the periodic table by looking at the atomic mass listed for that element.

For example, to find the molar mass of water (H2O), we would add the molar masses of two hydrogen atoms (2 x 1.01 g/mol) and one oxygen atom (16.00 g/mol) to get a total molar mass of 18.02 g/mol.

Another way is by finding the molecular formula of the compound, it can be done by analyzing the compound's chemical and physical properties and then using the mass spectrometer to determine the molecular weight.

In conclusion, the molar mass of a compound can be found by adding the molar masses of the atoms in the compound using the atomic masses listed on the periodic table, or by determining the molecular formula of the compound and using a mass spectrometer to find the molecular weight.

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The maximum gravitational force between two objects can be found by the given formula:

Gravitational force= (Gravitational constant X Mass of the first object x Mass of the second object) / (Distance between the centre of two bodies)².

In Physics, the gravitational force is one of the types of forces that attracts any two objects with mass. The other name of gravitational force is an attractive force as it pulls the two objects towards each other.

Newton's law of gravitation states that every object that exists in our universe is pulled by other objects. the other type of forces are the electromagnetic force, weak force, strong force etc.

The gravitational force on earth is maximum at the poles as the earth is an oblate spheroid, and that means it bulges out in the middle (the equator). This means that the poles of the earth ends up a little closer to the center of gravity as compared to other positions.

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Momentum is characterised as the intensity of a body's motion. The formula is "mass times velocity."

As momentum depends on velocity, it also depends on the body's direction of motion. Since velocity is a vector and mass is a scalar, momentum is a vector quantity.

Mass times speed equals momentum.

Momentum can be viewed as a body's "power" while it is moving, or the amount of force it can exert on another body. For instance, a baseball that is thrown quickly and with a tiny mass could have the same momentum as a bowling ball with a heavy mass travelling very slowly.

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Collisions are classified into three types: Collision with perfect elasticity, Collision that is inelastic, Collision with perfect inelasticity.

A collision is defined in physics as any event in which two or more bodies exert forces on each other in a relatively short period of time. In physics, a collision is the sudden, forceful coming together of two bodies, such as two billiard balls, a golf club and a ball, a hammer and a nail head, two railroad cars when coupled together, or a falling object and a floor. When two bodies come into direct contact with each other, this is referred to as a collision. The two bodies exert forces on each other in this case in a short period of time. As a result of the collision, the energy and momentum of the bodies interacting change.

Here,

Collisions are classified into three types: Collision with perfect elasticity, Collision that is inelastic, Collision with perfect inelasticity.

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if two balls are launched from a height. One is horizontally and other is vertically downwards, then both of the balls will touch the ground exactly at the same time.

When a ball is launched from a height than at some angle then its velocity(v) can be considered as divided into two components: One is vertical and the other is horizontal.

v₁ = vcosθ (horizontal component)

v₂ = vsinθ (vertical component)

Vertical component is always subjected to the acceleration due to gravity. Which is same for every vertical motion. Since the dropping height is same for both the balls, so their travelling time in the vertical downward direction will also be same. So they will touch the ground exactly at the same time.

--The given question is incomplete, the complete question is

"A physical demo launches a ball horizontally while dropping a second ball vertically at exactly same time from same height. Which ball will touch the ground first?"--

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Answer: If the mass of the object is 178 kg: k = 9.44*10^-5 N/m

Answer for the mass being 82 kg is not complete, because G was not given.

Explanation:

If the mass of the object is 178 kg:

The mass of object (m) = 178 kg

Length of tunnel (l) = 2640 km

***The minimum displacement (its amplitude) of object from its mean position,

A = 2640/2 = 1320 km = 1.320 * 10^6 m

Mass of planet (M) = 4.48 * 10^24 kg

Its Radius (R) = 8.26 * 10^6 m

Gravitational constant (G) = 6.67259 * 10^-11 Nm^2/kg^2

Now, restoring force for given hormonic motion will be

Vector of F = -((GMm)/R^3) * x

Comparing with, vector of F = -k*x, we get

k = (GMm)/R^3

k = (((6.67259*10^-11)*(4.48*10^24)*178)/(8.26*10^6)^3)

k = ((5320.99017*10^(-11+24))/(563.559976*10^18))

k = 9.44*10^(13-18)

k = 9.44*10^-5 N/m

If the mass of the object is 82 kg:

The mass of object (m) = 82 kg

Length of tunnel (l) = 2430 km

***The minimum displacement (its amplitude) of object from its mean position,

A = 2430/2 = 1215 km = 1.215*10^6 m

Mass of planet (M) = 4.16 * 10^24 kg

Its Radius (R) = 7 * 10^6 m

Gravitational constant (G) not given in the photo

Now, restoring force for given hormonic motion will be

Vector of F = -((GMm)/R^3) * x

Comparing with, vector of F = -k*x, we get

k = (GMm)/R^3

k = ((G*(4.16*10^24)*82)/(7*10^6)^3)

Remember that when multiplying two values with exponents, you add the exponents together!

k = ((3.4112*10^26 * G)/(3.43*10^20))

Insert G to solve!

Yes, torque can be measured by right hand rule. Turn your right hand in the direction of the position vector, your fingers in the direction of the force, and your thumb in the direction of the torque to apply the right-hand rule to torque-related problems.

Using the right-hand rule, the torque vector's direction is determined: Point the fingers of your right hand towards the direction of the force application point, beginning at the point of rotation. Curl your fingers in the force-direction, vector's and then extend your thumb from your hand.

The torque vector's path is established using the right-hand grip rule. If a hand is wrapped around the plane, the torque vector will point in the plane of the thumb.

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The SI unit representing momentum is kilograms per second. Strength or force acquired by motion or a sequence of occurrences

Mass in motion is a definition of momentum. All things have mass, thus if something is moving, it must have momentum because its mass is in motion. How much material is going and how quickly it is moving are the two factors that determine how much momentum an object has.

Increasing forward motion is often referred to as momentum. The speed of a boulder riding down a hill increases. The economy, a successful team, or a wonderful concept all have positive effects. You must multiply the mass by the velocity of an object to determine its physical momentum.

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Lectron and proton charges are of the same magnitude. ... Section 23.4: The Electric Field [fy 8.22 x 10 8 N (0.529 x 10 10 m) v 9.11 x 10 31 kilogram 2.19 xlO 6 m/s.

The mass of an electron is roughly 1/2000 that of a neutron or proton, and it has an electrical charges of 1. The letter e is typically used to represent electron charge. It is a basic physical fundamental that is used to represent the 1.602 10-19 coulomb, which is the unit of naturally occurring electric charge.

A atom with a negatively charged is an electron. A subatomic particle having a positive charge is called a proton. As a result, protons are linked together in the nucleus of an atom.the powerful nuclear force. A type of single atom called a neutron has no charge; it is neutral.

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Newton's third law does not hold always true.

Newton's third law, also known as the law of action and reaction, states that for every action force, there is an equal and opposite reaction force. This means that if object A exerts a force on object B, object B will exert an equal and opposite force on object A.

This is often demonstrated with examples such as a person pushing a wall or a rocket being propelled forward by the force of its exhaust.

One exception to this law is when forces such as friction and air resistance act on an object. These forces are not equal and opposite to the action force and can cause the reaction force to be less than the action force.

Another exception is when Newton's laws are applied in the realm of quantum mechanics, the laws of classical mechanics such as Newton's laws, no longer hold true.

In the quantum world, particles don't have definite positions or velocities, and they can exist in multiple places at once. As a result, the laws of classical mechanics do not apply to the quantum world.

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Newton included a constant known as the universal gravitational constant since we always need to introduce one to remove "G" proportionality.

Every particle in the cosmos is drawn to every other particle by a force that is directly proportional to the product of their masses and inversely proportional to the square of their separation, according to Newton's Law of Universal Gravitation.

F∝ Mm / r^2.

The gravitational constant, which is a proportionality constant, is what Newton utilized to derive his law of gravitation. The universal gravitational constant (UGC) is the force of attraction between any two unit masses separated by a unit distance.

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The kinetic energy of a car with a mass of 1050kg and a velocity of 5m/s will be 13,125 joules or 13,125 kg⋅m2⋅s−2.

As we know, the formula to find the kinetic energy in a system is [tex]1/2 m v^{2}[/tex] where m is the mass of the system and v is the given velocity at the moment. So , by putting the given data in the equation, we get :

⇒[tex]1/2mv^{2}[/tex]

⇒1/2 x 1050 x 5 x 5

⇒525 x 25

⇒13,125

∴ The Kinetic energy of the car will be 13,125 Joules where joule is the SI unit of energy.

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The part of the visual field that surrounds the figure is called linear.

Linear perspective is a visual cue that allows a viewer to discern the depth and range of an object. Field of vision of a person's eye is that portion in the space in which object is visible to the viewer. The most clear vision subtend a central angle of 3° on the eye. However the monocular visual area consists of central vision, which includes the inner 30 degrees angle of vision and central fixation, and the surrounding visual field, which expand 100 degrees laterally. A vertical line bisects central vision and divides the visual field. The blind spot is represented on a visual field chart by a partial alteration in the field of vision.

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Correct option is (A) 0.8  

What is Modulation Index ?

-- Modulation index is defined as the ratio of the amplitude of the modulating wave to that of the carrier wave

-  Modulation index: m = Am / Ac

: Given 2Am = 8 Am + Ac = 9

⇒ Ac = 5

∴ m = 4/5 = 0.8.

What is Electromagnetic Wave ?

-'Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field.

-- In other words, EM waves are composed of oscillating magnetic and electric fields.

What is Magnetic Field?

-- A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.

--A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.

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While an object's weight is affected by gravity, its mass is not.

A thing's mass is the total amount of its constituent parts. Mass is a scalar quantity with a single value and no directionality.

mg = mass (N).

Gravity causes variations in acceleration that cause an object's weight to vary from one place in space to another. Weight is a vector quantity, hence it has a magnitude and a direction. As a result, weight depends on gravitational pull.

This leads us to the conclusion that while an object's mass is not affected by gravity, its weight is.

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The electric intensity at a point 4 cm from the center is 2,880 N/C.

The electric field intensity of the charge is calculated by applying the following formula as show below.

E = F / q

E = ( kq ) / ( r² )

where;

The electric intensity at a point 4 cm from the center is calculated as;

E = ( 9 x 10⁹ x 3.2 x 10⁻⁹ ) / ( 0.1² )

E = 2,880 N/C

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