From the definition of the standard Ohm calculates the resistivity and conductivity of mercury at 0°
C. Given that standard Ohm is the resistance of thread from mercury with a uniform cross-sectional
area 1mm2 and its length 106.3 cm at 0°C. (hint: standard Ohm has a resistance of unity)

Most helpful Answer~

There are no options~

Anyway If the ball is of bad quality it will get deflated/ or strike out.

' The must reasonable thing that could happen is that the ball will bounce'

*Smile* :)  

The dimension of concentration is shared by the equivalent formulas for equilibrium constants in thermodynamic and kinetic systems, although K, the thermodynamic equilibrium constant, is always dimensionless.

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The physics quantity that describes the tendency of an object to remain in its state of motion is called inertia. The concept of inertia arises from the idea that objects have mass and require a force to alter their motion.

Inertia is one of the fundamental principles of physics described by Newton's First Law of Motion. It refers to the property of matter that resists any changes in its state of motion. An object at rest tends to stay at rest, while an object in motion tends to stay in motion with a constant velocity, unless acted upon by an external force.

The concept of inertia arises from the idea that objects have mass and require a force to alter their motion. The greater the mass of an object, the greater its inertia. This means that objects with larger masses have a stronger tendency to resist changes in their motion.

Inertia is a fundamental aspect of everyday experiences. For example, when a car suddenly stops, passengers tend to lurch forward due to their inertia. Similarly, when a moving train comes to a halt, objects inside it may slide forward because of their tendency to maintain their state of motion.

In summary, inertia is the physics quantity that describes an object's resistance to changes in its state of motion and plays a crucial role in understanding the behavior of objects under the influence of external forces.

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Answer:

A.  It is zero.

Explanation:

D Later in the day, more power is developed in lifting each box. 12 A manometer is used to indicate the pressure in a steel vessel, as shown in the diagram. What value does the liquid manometer give for the pressure in the vessel? It is zero

Answer:

Gravity overcomes the hex nut's stationary inertia and moves the nut straight down into the bottle.

Explanation:

Hope this helps.

Have a good night ma´am/sir.

Be safe!

The angle between the vectors u and v is 3π/4, and the dot product of (8,0) and (-3,-3) is -24.

To sketch the vectors, draw a coordinate plane and plot the points (8,0) and (-3,-3). The vector u starts at the origin (0,0) and extends to the point (8,0). The vector v starts at the origin (0,0) and extends to the point (-3,-3).

To find the angle between the vectors, we can use the dot product formula: u · v = |u| |v| cos θ. The magnitude of u (|u|) is 8, and the magnitude of v (|v|) is √((-3)^2 + (-3)^2) = √18 = 3√2. Plugging these values into the formula: 8 * 3√2 * cos θ = -24. Solving for cos θ: cos θ = -24 / (8 * 3√2) = -1 / (3√2).

Since the dot product is negative, the angle between the vectors is obtuse. The angle θ can be found using the inverse cosine function: θ = cos^(-1)(-1 / (3√2)). Simplifying this expression, we get θ = 3π/4.

The angle between the vectors u and v is 3π/4, and the dot product of (8,0) and (-3,-3) is -24. The sketch confirms the direction and length of the vectors, and the calculations verify the angle and dot product values.

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A student generates water waves in a pool of water. In order to increase the energy carried by the waves, the student should generate waves with a higher frequency, larger amplitude, or a combination of both.

Frequency refers to the number of waves produced per second, and amplitude refers to the height of the wave. Increasing the frequency of the waves will increase the amount of energy carried by the waves.

This is because higher frequency waves have more cycles per second, which means more energy is transferred in a given amount of time.

Larger amplitude waves also carry more energy, as the height of the wave is directly proportional to the amount of energy being carried.

Additionally, the student could use a larger source of energy to generate the waves. For example, using a larger paddle to generate the waves

would result in more energy being transferred to the water, which would increase the energy carried by the waves.

In summary, in order to increase the energy carried by water waves in a pool, the student should generate waves with a higher frequency,

larger amplitude, or a combination of both, and use a larger source of energy to generate the waves.

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According to the research, the correct option is Magnetite. It is a mineral that can scratch glass, has a non-metallic luster, has fracture and is a dark red color.

It refers to a dark red colored mineral from the group of oxides, very dense, has a hard non-metallic luster and with ferromagnetic properties, it is capable of attracting iron and steel along with other metals.

Iron is used to make steel, the main use of this mineral since it is found scattered as an accessory mineral in many igneous rocks.

Therefore, we can conclude that according to the research, the correct option is Magnetite. It is a mineral that can scratch glass, has a non-metallic luster, has fracture and is a dark red color.

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Answer:

w = 706.32 [N]

Explanation:

The force due to gravitational acceleration can be calculated by means of the product of mass by gravitational acceleration.

w = m*g

where:

w = weight [N] (units of Newtons)

m = mass = 72 [kg]

g = gravity acceleration = 9.81 [m/s²]

Then we have:

\(w = 72*9.81\\w = 706.32 [N]\)

Answer:

397 j

Explanation:

Because 5.0kg yuh

The kinetic energy of the block with a mass of 5.0 kg is pushed on a frictionless surface by applying a horizontal force of 80.0 N. The block starts from rest, and its final velocity is 12.6 m/s is 396.9 J.

A moving item or particle has a certain kind of power called kinetic energy. When an item exerts a net force to perform work, which involves the transfer of energy, the object accelerates and as a result, gains kinetic energy.

The amount of kinetic energy that a moving object or particle possesses is determined by both its mass and rate of motion. Any combination of vibration, axis rotation, translation (or movement along a path from one location to another), and translation are all possible motion types.

Given:

The mass of the block, m = 5 kg,

The horizontal force, F = 80 N,

The velocity of the block, v = 12.6 m / s,

Calculate the kinetic energy by the formula given below,

\(KE = 1/2mv^2\)

KE = 1 / 2 × 5 × 12.6²

KE =  1 / 2 × 5 × 158.6

KE = 396.9 J

Therefore, the kinetic energy of the block with a mass of 5.0 kg is pushed on a frictionless surface by applying a horizontal force of 80.0 N. The block starts from rest, and its final velocity is 12.6 m/s is 396.9 J.

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The complete question is A block with a mass of 5.0 kg is pushed on a frictionless surface by applying a horizontal force of 80.0 N. The block starts from rest, and its final velocity is 12.6 m/s. ​Find its kinetic energy?

The test statistic (Z-score) is approximately 4.95.

To calculate the test statistic (Z-score) for this hypothesis test, we can use the formula:

Z = (sample mean - hypothesized population mean) / (standard deviation / sqrt(sample size))

Sample mean (X-bar) = 37

Hypothesized population mean (μ) = 30

Standard deviation (σ) = 8

Sample size (n) = 50

Substituting these values into the formula, we get:

Z = (37 - 30) / (8 / sqrt(50))

Z = 7 / (8 / 7.071)

Z = 7 / 1.414

Z = 4.95 (rounded to two decimal places)

A statistical hypothesis test is a technique for determining if the available data are sufficient to support a certain hypothesis. We can make probabilistic claims regarding population parameters using hypothesis testing.

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Answer:

The net displacement is

\(R= \sqrt{A^2+B^2+2AB \cos \theta}\)

\(=\sqrt{15^2+25^2+2AB \cos 30^\circ} \\\\=\sqrt{225+625+ \cos30^0} \\\\=38.7m\)

Explanation:

Suppose that you walk 15 meters at 30 degrees as measured from the East. Then you walk another 25 meters at 60 degrees from the East what is your net displacement

Given data

A = 15 m

B = 25 m

Angle between the vectors A and B is θ = 30°

The net displacement is

\(R= \sqrt{A^2+B^2+2AB \cos \theta}\)

\(=\sqrt{15^2+25^2+2AB \cos 30^\circ} \\\\=\sqrt{225+625+ \cos30^0} \\\\=38.7m\)

Answer:T=1316.21 N

Explanation:

The tension has two components: Vertical and Horizontal. The

horizontal component is ma, the vertical component is mg. Using

Pythagoras theorem, we can find the tension as:

T=((ma)^2 (mg)^2)^(1/2)

So

T=((129*2.84)^2 (129*9.8)^2)^(1/2)

T=1316.21 N

Answer:

16. An object has a gravitational potential energy 41,772.5 Jof and has a mass of 1550 kg. How high is it above the ground? Plz help

Answer: 20.4 m

Explanation: \(\frac{9.8^{2} }{Velocity} = Max Height\)

The answers to this test are:

1.  What is the maximum speed when the conditions are mass = 450 kg, initial height = 30 m, and the roller coaster car is initially at rest?  

24.2 m/s

2. A computational model predicts the maximum height that a roller coaster car can reach when the lowest height of its journey is at ground level, where it has a speed of 20 m/s. Given these conditions, what is the maximum height?

20.4 m

3. A computational model predicts the speed of a roller coaster car at different heights given its speed at the lowest height of its journey, which is at ground level. The speed at the lowest point is 30 m/s. What is the prediction for its speed when it is at a height of 20 m?

22.5 m/s

4. A computational model predicts the maximum potential energy a roller coaster car can have given its mass and its speed at the lowest point of its journey. Its mass is 350 kg, and it speed at a height of 0 m is 25 m/s. What is the prediction for its maximum potential energy?

109,375 J

5. What is the benefit of using simple computational models in a spreadsheet application, like the one used in this course, to predict mechanical energy and related values?

It is easy to calculate new scenarios.

The electrical field on the second surface is larger when two identically charged spheres are encircled by identically sized gaussian surfaces. as a result of the second surface's larger area.

The electric field is described as a vector field, where each point in space is associated with the electrostatic (Coulomb) force per unit of charge. This description is based on an infinitesimal positive test charge at rest. The volt per metre (V/m) is the derived SI unit for the electric field, the newton per coulomb (N/C). In the end, the  electrical field that both charges create around them is what drives the force that the two charges apply to one another.

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The key phrase which describes zero (0) initial velocity is from rest.

When the velocity of an object at initial time is zero (0), it implies that the change in the displacement of the object with time is zero

\(v= \frac{\Delta x}{\Delta t} \\\\v_0 = 0\)

Generally, when an starts its motion from rest, the initial velocity of the object will be zero. As the object acquires more momentum, the velocity increases with time.

Thus, we can conclude that the key phrase which describes zero (0) initial velocity is from rest.

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Answer: 1.4mi/hr²

Explanation:

Blank 1: We know that acceleration is the change in velocity/change in time

Using this, we know that the acceleration will be: (50-15)/25 = 1.4

Blank 2: mi/hr²

The increase in length of the copper with original length of 120 m is  8.16×10⁻² m.

A change in length ΔL is produced when a force is applied to a wire or rod parallel to its length L0, either stretching it (a tension) or compressing it.

To calculate the increase in length of the copper, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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Seismic waves are sent from the AP center in an earthquake. Waves move through various materials in a variety of orientations. The seismic waves would go forth at the same pace in all directions, which would be true for everyone who felt the ground trembling. Here option A is the correct answer.

When an earthquake occurs, it generates seismic waves that travel through the Earth's layers and cause the ground to shake. These waves propagate in different directions and interact with the media they encounter, including rock, soil, and water. As a result, the shaking experienced by people who feel the earthquake may vary depending on their location and the type of surface they are standing on.

Out of the given options, only option A can be considered true for all people who feel earth-shaking. This is because seismic waves travel outward from the epicenter in all directions at the same speed, regardless of the type of surface they encounter. However, the other options are not necessarily true for all observers.

Option B, which suggests that the amplitude of the shaking will be the same for all observers, is not accurate because the intensity of the shaking can vary depending on factors such as the distance from the epicenter, the direction of propagation, and the type of soil or rock that the seismic waves encounter.

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Complete question:

An earthquake sends seismic waves outward from the epicenter. the waves travel through different media in different directions. what will be true for all people who feel the earth shaking?(1 point)

A - the seismic waves will travel outward at the same speed in all directions.

B - the amplitude of the shaking will be the same for all observers.

C - the earth will rise and fall with the same frequency.

D - the seismic waves will be equally far apart for all observers.

Example reuikfur2skied

Answer:

In a wheelbarrow, the load is in the middle. The fulcrum is at the end where the wheels touch the ground. The effort is applied at the other end where we hold the wheelbarrow. So, it is classified as a class 2 lever.

Explanation:

Btw, you spelled liver, not lever. Anyway, hope this helped you! The answer is underlined.

We have that for the Questions

a the gravitational potential energy at a relative to B

b. the particle's kinetic energy at B

c the particle's speed at B

d. the potential energy and kinetic energy at C

it can be said that

a)P.E=0.63210Js

b)K.E=0.63210J

c)v=2.420m/s

d)K.E=0.5mv^2

P.E=mgh

From the question we are told

215 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 30.0 cm, as shown at right

a)

Generally the equation for the  gravitational potential energy   is mathematically given as

P.E=mgh

P.E=0.215x9.8 x 0.3

P.E=0.63210J

b)

Generally the equation for the   kinetic energy  is mathematically given as

K.E=0.5mv^2

Where

P.E=K.E at point B

Therefore

K.E=0.63J

c)

Generally the equation for the  speed   is mathematically given as

\(v=\sqrt{\frac{0.63}{0.5m}}\)

v=2.420m/s

d)

The potential energy and kinetic energy at C

Will be given by the equation

K.E=0.5mv^2

P.E=mgh

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The velocity of the ejected electron is 5.74 x 105 m/s

When a photon strikes a metal surface, it causes the release of an electron. This phenomenon is known as the photoelectric effect, and the electron is referred to as a photoelectron. The energy of the incoming photon is used to free the electron from its binding energy and to provide it with kinetic energy. The photoelectric effect is a quantum phenomenon that occurs when light strikes a material surface. When a photon strikes a metal surface, it causes an electron to be emitted, resulting in the emission of a photoelectron. The photoelectron has a velocity that is proportional to the energy of the incoming photon and is defined by the equation KE = hν - Φ, where KE is the kinetic energy of the photoelectron, h is Planck's constant, ν is the frequency of the incoming photon, and Φ is the binding energy of the electron in the material.

In the question, we are given the binding energy of an electron in mercury, which is 7.22 x 10-19 J. We are also given the wavelength of an incoming photon, which is 200 nm. To calculate the velocity of the ejected electron, we need to use the equation KE = hν - Φ. We can first calculate the frequency of the incoming photon using the equation c = λν, where c is the speed of light, λ is the wavelength of the incoming photon, and ν is the frequency. Solving for ν, we get:ν = c/λν = (3.00 x 108 m/s)/(200 x 10-9 m)ν = 1.50 x 1015 Hz. We can now substitute the values we have into the equation KE = hν - Φ to calculate the kinetic energy of the ejected electron: KE = hν - ΦKE = (6.63 x 10-34 J s)(1.50 x 1015 Hz) - 7.22 x 10-19 JKE = 9.96 x 10-19 J. Finally, we can use the kinetic energy of the ejected electron to calculate its velocity using the equation KE = 1/2mv2, where m is the mass of the electron and v is its velocity. Solving for v, we get:v = √(2KE/m)v = √(2(9.96 x 10-19 J)/(9.11 x 10-31 kg))v = 5.74 x 105 m/s. Therefore, the velocity of the ejected electron is 5.74 x 105 m/s. Thus, the velocity of the ejected electron is 5.74 x 105 m/s.

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Complete question:

A small 175-g ball on the end of a light string is revolving uniformly on a frictionless surface in a horizontal circle of diameter 1.0 m. The ball makes 2.0 revolutions every 1.0 s. What are the magnitude and direction of the acceleration of the ball?

Answer:

The acceleration of the ball is 78.98 m/s², directed inwards

Explanation:

Given;

mass of the ball, m = 175 g

radius of the circle, r = 0.5 m

angular speed of the ball, ω = 2 rev/s

The magnitude of the centripetal acceleration of the ball is calculated as follows;

\(a_c = \omega^2 r\\\\where;\\\omega \ is \ angular \ speed \ in \ rad/s\\\\a_c = (2\ \frac{rev}{s} \times \frac{2\pi \ rad}{1 \ rev} )^2 \times (0.5 \ m)\\\\a_c =78.98 \ m/s^2\)

The centripetal acceleration is directed inwards.

The maximum cargo load of the Goodyear blimp is 2568.8 kg when flying at a sea-level location with an air temperature of 20°C.

To solve this problem, we need to use Archimedes' principle, which states that the buoyant force on an object is equal to the weight of the fluid displaced by the object. In this case, the fluid is air, and the buoyant force on the blimp is equal to the weight of the air displaced by the blimp.

First, we need to calculate the weight of the blimp, which is equal to the sum of the envelope and gondola:

Weight of blimp = 4300 kg

Next, we need to calculate the weight of the air displaced by the blimp. We can use the density of air at 20°C, which is approximately 1.204 kg/m³:

Volume of blimp = 5700 m³

Weight of air displaced = Volume of blimp x Density of air = 5700 x 1.204 = 6868.8 kg

Finally, we can calculate the maximum cargo load by subtracting the weight of the blimp from the weight of the air displaced:

Maximum cargo load = Weight of air displaced - Weight of blimp = 6868.8 - 4300 = 2568.8 kg

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Answer:

d one

Explanation:

d one frome my site

Answer:

d

Explanation:

d

Answer:

E = -477 N/C

Explanation:

Given that,

Charge, \(q=-4.77\times 10^{-9}\ C\)

We need to find the electric field at a point 0.3 m to the right of the charge.

We know that the electric field at a distance r is given by :

\(E=\dfrac{kq}{r^2}\\\\E=\dfrac{9\times 10^9\times 4.77\times 10^{-9}}{(0.3)^2}\\\\E=-477\ N/C\)

So, the electric field is -477 N/C.

Similar like magnets, opposites are drawn together. A magnet's north pole will adhere to another magnet's south pole. However, a magnet's north pole will push away from another magnet's north pole.

When two diametrically opposed poles combine, the same logic applies. The magnets are compelled to come together because of the intense attraction.

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