if i double the length, and halve the radius of a copper wire, what is the value of its new resistance? original resistance was r0

When Fez engages in team activities such as running or passing the ball, they are maintaining tension with an equal force on all sides.

Any physical object that is in contact with another one can apply forces to that object. The pulling force transmitted axially by a string, cable, chain, or other similar object, or by each end of a rod, truss member, or other similar three-dimensional object is referred to as tension. The action-reaction pair of forces acting at each end of said elements can also be referred to as tension.

The force produced when a load is applied at one or more of the ends of a material in a direction away from the material's cross-section is known as the tension force. It's common to describe a tension force as a "pulling" force. To exert a tension force on the material, the load must be applied axially.

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The 8 planets in order are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

The 8 planets in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. They are arranged in order according to their distance from the sun, starting with the planet closest to the sun and ending with the planet farthest away.

Mercury: Mercury is the closest planet to the sun and is also the smallest planet in our solar system. It is known for its extremely hot surface temperature due to its close proximity to the sun.

Venus: Venus is the second planet from the sun and is often referred to as the Earth's sister planet due to its similar size and density. However, it has a much hotter surface temperature due to the thick atmosphere of carbon dioxide that traps heat.

Earth: Earth is the third planet from the sun and is the only known planet with life. It has a unique atmosphere that contains oxygen, which is essential for the survival of living organisms.

Mars: Mars is the fourth planet from the sun and is known as the Red Planet due to its reddish appearance. It has a thin atmosphere and is also home to the largest volcano and deepest canyon in our solar system.

Jupiter: Jupiter is the fifth planet from the sun and is the largest planet in our solar system. It has a very strong magnetic field and is also known for its many moons and large red spot, which is a giant storm that has been raging for hundreds of years.

Saturn: Saturn is the sixth planet from the sun and is known for its distinctive rings, which are made up of countless small particles of ice and rock. It is also the least dense planet in our solar system and has many moons, including the largest moon in our solar system, Titan.

Uranus: Uranus is the seventh planet from the sun and is known for its unusual tilt, which causes it to rotate on its side. It is also the coldest planet in our solar system and is home to several unique features, including its ring system and numerous moons.

Neptune: Neptune is the eighth and farthest planet from the sun and is known for its strong winds and large, dark storms. It is similar in size and composition to Uranus and is also the only planet in our solar system that was not discovered using a telescope.

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The speed of propagation of the transverse wave in the wire is 4800 cm/s. The tension in the wire is 15.71 N and the maximum transverse acceleration is 11,105,600 cm/s².

A transverse wave is a type of wave in which the particles of the medium move in a direction perpendicular to the direction of energy propagation. Examples of transverse waves include light, radio, and other types of electromagnetic waves.

The speed of propagation is the speed at which a signal travels through a medium, such as a wire, fiber optic cable, or radio wave.

(a) Speed of propagation of the transverse wave in the wire =

v = λf

= (80.0 cm) (60.0 Hz)

= 4800 cm/s

b)Tension in the wire = F/A

= m(ω² X A_max) / A

= (40.0 g)(2π² X 60²  X 0.300 cm²) / (80.0 cm)²

= 15.71 N

(c) Maximum transverse velocity = A_max X ω

= 0.300 cm X 2π X 60 Hz

= 1842.4 cm/s

Maximum transverse acceleration = A_max X ω²

= 0.300 cm X (2π X 60)²

= 11,105,600 cm/s²

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The correct answer is c. friction loss develops much slower than change in velocity.

The second principle of friction loss states that as the velocity of a fluid increases, the friction loss within the system increases, but at a much slower rate compared to the change in velocity. In other words, the increase in friction loss is not directly proportional to the change in velocity. This principle is based on the fact that as the fluid moves faster, the pressure drop due to friction along the pipe walls increases, resulting in some energy loss. However, this energy loss is not as significant as the increase in velocity itself. Therefore, the friction loss develops much slower compared to the change in velocity.

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An audience member covers her ears during a loud concert shows evidence that matter can reflect waves.

An audience member covers her ears during a loud concert is an event that provides evidence that matter can reflect waves because a sound is heard again and again due to the reflection of waves. This repetition of sound is due to the property of reflection of sound waves.

So we can conclude that an audience member covers her ears during a loud concert shows evidence that matter can reflect waves.

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Answer:

A laser beam bounces off a series of mirrors

Explanation:

0.1M HCl will have a lower pH (be more acidic) than 0.1M H2SO4.

The pH of a solution is determined by the concentration of hydrogen ions (H+). In the case of hydrochloric acid (HCl) and sulfuric acid (H2SO4), both are strong acids that dissociate completely in water. However, sulfuric acid (H2SO4) dissociates into two H+ ions per molecule, while hydrochloric acid (HCl) dissociates into only one H+ ion per molecule.

Therefore, for the same concentration (0.1M), H2SO4 will produce twice as many H+ ions as HCl, resulting in a higher concentration of H+ ions and a lower pH. Hence, 0.1M HCl will have a lower pH and be more acidic than 0.1M H2SO4.

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Thermal energy from the room-temperature water will continuously flow to the boiling water.

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About, Kuiper belt objects have been seen orbiting by Neptune, according to observations of these objects. forty thousand celestial units.

In contrast to rocks or other solid objects, Neptune has a core the size of Earth made of heated liquids, making it a gas giant like Jupiter and Saturn. Neptune's atmosphere is primarily made up of water, ammonia, and methane, same as that of Uranus, another "ice giant." Neptune's startling blue color is caused by methane.

It has a solid center the size of Earth covered in a dense fog comprising water, ammonia, and methane. Hydrogen, helium, plus methane make up its atmosphere. Neptune shares Uranus' blue tint thanks to the methane.

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a. The amplitude of the motion if a 2.00 kg frictionless block attached to an ideal spring with force constant 265 N/m and has displacement +0.200 m is 0.264 m.

b. The maximum acceleration of the block is 34.938 m/s².
C. The maximum force the spring exerts on the block is 69.96 N.

To find the amplitude of the motion, we need to use the equation for total mechanical energy of the system:

E_total = 1/2 kA²

= 1/2 mv² + 1/2 kx²

Here, k = 265 N/m (spring constant), m = 2.00 kg (mass), x = 0.200 m (displacement), and v = 3.50 m/s (speed). Plugging in the values and solving for A (amplitude), we get:

A = √((mv² + kx²) / k)

= √((2*3.50² + 265*0.200²) / 265)

= 0.264 m

To find the maximum acceleration (a_max), we can use the equation:

a_max = kA/m

Plugging in the values, we get:

a_max = 265 × 0.264 / 2

= 34.938 m/s²

To find the maximum force the spring exerts on the block, we use the equation:

F_max = kA

Plugging in the values, we get:

F_max = 265 × 0.264

= 69.96 N

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An electron moves left to right in the plane of the page when it enters a magnetic field going into the page. The acceleration of the electron is downward. So option B. is the correct answer.

Contemplate an electron moving at a constant speed from left to right in the plane of the page when it penetrates a magnetic field going into the page. We know that the direction of the acceleration is in the orientation of the force by the application of Newton's 2nd Law of Motion. Now by utilizing the right-hand rule, point the index finger in the direction contrary to motion of the electron that is towards left side and points the middle finger into the page, then the thumb points downward. Hence, we can signify that the direction of the acceleration is downward.

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Atoms have no electric charge because they have an equal number of electrons and protons.

Explanation:

So from this, we can conclude that atoms have no electric charge because they have an equal number of electrons and protons. Option C is correct.

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The time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

The cooling law is given by:

$$\frac{dQ}{dt}=-k(T-T_0)$$

where Q is the heat in the object, t is the time taken, T is the temperature of the object at time t, T0 is the temperature of the environment and k is a constant known as the cooling constant.

We need to find the time it takes for the coffee to reach a drinking temperature of 73°C given that its initial temperature is 93°C.

Therefore, we need to find the time it takes for the coffee to cool down from 93°C to 73°C when placed in a room temperature of 18°C.

Let’s assume that the heat energy that is lost by the coffee is equal to the heat energy gained by the environment. We can express this as:

dQ = - dQ where dQ is the heat energy gained by the environment.

We can substitute dQ with C(T-T0) where C is the specific heat capacity of the object.

We can rearrange the equation as follows:

$$-\frac{dQ}{dt}=k(T-T_0)$$

$$-\frac{d}{dt}C(T-T_0)=k(T-T_0)$$

$$\frac{d}{dt}T=-k(T-T_0)$$

The differential equation above can be solved using separation of variables as follows:

$$\frac{d}{dt}\ln(T-T_0)=-k$$

$$\ln(T-T_0)=-kt+c_1$$

$$T-T_0=e^{-kt+c_1}$$

$$T=T_0+Ce^{-kt}$$

where C = e^(c1).

We can now use the values given to find the specific value of C which is the temperature difference when t=0, that is, the temperature difference between the initial temperature of the coffee and the room temperature.

$$T=T_0+Ce^{-kt}$$

$$73=18+C\cdot e^{-0.09t}$$

$$55=C\cdot e^{-0.09t}$$

$$C=55e^{0.09t}$$

$$T=18+55e^{0.09t}$$

We can now solve for the value of t when T=93 as follows:

$$93=18+55e^{0.09t}$$

$$e^{0.09t}=\frac{93-18}{55}$$

$$e^{0.09t}=1.3636$$

$$t=\frac{\ln(1.3636)}{0.09}$$

Using a calculator, we can find that the time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

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Answer:

Abiotic referfers to non-living and biotic factors are living or once living

Explanation:

Answer:The answer sir would be 180.38

Explanation:

When starting a single-speed bicycle, you have to push harder on the pedals to overcome the initial inertia and get the bike moving from a stationary position.

When starting a single-speed bicycle, you have to push harder is because the bike has to overcome the force of friction between the tires and the ground, as well as any other resistive forces like air resistance or the weight of the bike and rider.

Once the bike is in motion, however, it requires less force to maintain a constant velocity because the bike has already overcome the initial inertia and has momentum working in its favor. As long as the resistive forces like air resistance and friction are not too strong, the bike can continue to move at a constant velocity with relatively little effort from the rider.

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Answer:

A reason why voltmeter is always connected in parallel not in series ​is:

A Voltmeter has very high resistance to ensure that it's connection do not alter flow of current in the circuit. Now if it is connected in series then no current will be there in the circuit due to it's high resistance. Hence it is connected in parallel to the load across which potential difference is to be measured.

Answer:

the fastest would be gas, liquid would be in the middle and solid would be the slowest

Explanation: brainliest pls

Answer:

Solid → Liquid → Gas

Explanation:

The speed of molecules in an object increases as temperature increases.

An example of said molecules at different states of matter:

Explanation:

0.75

According to the formula, P=IV

150 = I×200

Bullet 2 has twice the mass of bullet 1. Both are fired so that they have the same speed. If the kinetic energy of bullet 1 is K. The kinetic energy of bullet 2 is 2K.

In this scenario, both bullets are fired with the same speed, indicating that they possess the same kinetic energy. However, bullet 2 has twice the mass of bullet 1.

The kinetic energy of an object is given by the equation KE = (1/2)mv², where KE represents the kinetic energy, m represents the mass of the object, and v represents its velocity or speed.

Since the speed is the same for both bullets, we can compare their kinetic energies by looking at their masses. If bullet 2 has twice the mass of bullet 1, then the ratio of their kinetic energies can be calculated as follows:

KE2/KE1 = (1/2)m2v² / (1/2)m1v²

= m2 / m1

Since bullet 2 has twice the mass of bullet 1, the ratio of their kinetic energies is:

KE2/KE1 = 2/1

= 2

This means that the kinetic energy of bullet 2 (KE2) is twice that of bullet 1 (KE1). Therefore, the correct answer is that the kinetic energy of bullet 2 is 2K.

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Given

The concept of inertia forms the basis for Newton's Third Law of Motion

To find

The given statement is true or false

Explanation

The third law of motion states that every action has a equal and opposite reaction

Inertia is the property by virtue of which an object at rest tends to be at rest and object at motion tends to be at motion

Thus both the concept are not similar

Conclusion

The given statement is false

When a flat sheet of paper falls to the floor, the following forces are acting on it:

Gravitational force: The Earth's gravitational force is acting on the paper, pulling it towards the ground.

Air resistance force: As the paper falls through the air, air molecules collide with it and create an upward force, known as air resistance.

Buoyant force: If the paper is falling through a fluid, such as water, there will be a buoyant force acting on it due to the displacement of fluid by the paper.

Electrostatic force: There may also be some electrostatic force acting on the paper due to static electricity, but this force is usually much smaller than the other forces mentioned above.

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Answer:

8 oz

Explanation:

Answer:

lighter ones will go faster

Explanation:

assuming you throw both bolwing ball with 10N of force. one is 3kg and the other is 5kg.

by using the equation: F = ma

a = F/m

a = 10/5 = 2m/s^2

a = 10/3 = 3.33333 m/s^2

Given,

The mass of the barbell, m=70 kg

The height to which Slim Jim lifts the barbell, h=1.4 m

a)

When the barbell was on the ground, it will have zero kinetic energy as it has no velocity. And if assume the height of ground as zero meters, then its potential energy is also zero.

Thus when the barbell was on the ground, its energy was zero joules.

b)

The energy of the barbell when it is at a height of h is given by,

Where g is the acceleration due to gravity.

On substituting the known values,

Thus the energy that the barbell has after being lifted 1.4 m is 960.4 J

This energy is the energy stored in the barbell due to its position. Thus the energy stored in the barbell is the potential energy.

Slim Jim has to do some work to lift the barbell to the given height. This work done will be stored in the barbell in the form of potential energy. That is, the energy of the barbell is supplied to it from Slim Jim through the work.

c)

All the work done by Jim will be stored in the barbell in the form of potential energy. Thus, the work done by Jim is equal to the potential energy of the barbel.

Therefore, the work done by Jim is 960.4 J

d)

Given,

The time interval, t=1.5 s

The power is given by,

Where W is the work done by Jim.

On substituting the known values,

Thus the power used by Jim is 640.27 W

Answer: Based on your table, how could you calculate the elasticity of a collision if you know the approach velocity and separation velocity of the colliding objects? You can calculate the elasticity of a collision by dividing separation velocity by approach velocity (Equation: Vs/Va).

Explanation:

plz mark me branilest

→ \(Elastic \ collision = \frac{V_s}{V_a}\)

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Answer:

The answer is "1.0748 and 1.0875".

Explanation:

Please find the complete question in the attachment file.

The incidence angle is \(i=45^{\circ}\) for all colors When the angle is r, then use \(\frac{\sin{i}}{\sin{r}}=\frac{n_{o}}{n}\) . Snell's rule Where \(n_{o}\) is an outside material reflectance (same hue index) or n seems to be the crown glass index of the refraction, That index of inclination is \(90^{\circ}\) as the light in color shifted behaver from complete inner diffraction to diffraction.

Whenever the external channel has a thermal conductivity for the red light, that's also

\(n_{o}=\frac{n_{r}\sin{45^{\circ}}}{\sin{90^{\circ}}}=\frac{1.520\times\sin{45^{\circ}}}{\sin{90^{\circ}}}=1.0748\)

When outside the material has a refractive index, this happens with violet light.

\(n_{o}=\frac{n_{r}\sin{45^{\circ}}}{\sin{90^{\circ}}}=\frac{1.538\times\sin{45^{\circ}}}{\sin{90^{\circ}}}=1.0875\)

In point a, The only red light flows out from the leaned face and the residual colors are mirrored mostly on prism for the primary benefits \(n_{o}=1.0748\) (and slightly larger than that).

In point b, The only violet light is shown in the prism with the majority of the colors coming out from the sloping face for a scale similar to \(n_{o}= 1.0875\) (and slightly smaller than this).

Answer:

the ball is travelling very fast and the player can get injured if he doesn't wear gloves

Explanation:

Responda:

1 metro

Explicação:

Dado que :

Tempo de reação = 0,2 segundos

Velocidade de deslocamento = 5 m / s

A distância percorrida antes da frenagem pode ser obtida usando a relação:

Distância = velocidade de viagem * tempo de reação

Distância percorrida antes da frenagem = (5 m / s) * (0,2s)

Distância percorrida antes da frenagem = 1 metro

Answer:

I believe it's called a diatomic atom