In order for electrons to move, there must be voltage difference.TrueFalse

The accurate statement when discussing specific heat is  option A) The specific heat of a gas can be measured at constant pressure.

This is because specific heat is the amount of heat energy required to raise the temperature of a substance by a certain amount. For gases, the specific heat can be measured at either constant pressure or constant volume. However, when discussing specific heat in general, it is more commonly measured at constant pressure.

Option B is incorrect because the specific heat of a gas can also be measured at constant volume, not just constant volume only.

Option C is incorrect because specific heat values for liquids can vary for different ranges of temperature. The specific heat of a substance may change with temperature due to variations in molecular interactions and other factors.

Option D is incorrect because specific heat values for solids can also vary for different ranges of temperature. The specific heat of a solid can depend on factors such as crystal structure, impurities, and temperature range.

Therefore, the accurate statement is option A, which states that the specific heat of a gas can be measured at constant pressure.

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Answer:

-Positively charged nucleus

-Empty spaced

-Dense core

Explanation:

The speed  in meters per second if the string breaks suddenly is 9.6 m/s.

The angular speed is the speed of an object that is moving along a circular path. In this case, we have a puck of mass m = 0.095 kg is moving in a circle on a horizontal frictionless surface. It is held in its path by a massless string of length L = 0.69 m. The puck makes one revolution every t = 0.45 s.

Let us recall that in order to find the angular speed as is required by the question "how fast  in meters per second, does the puck move away?" we have to get the angle turned as well as the time taken.

We are told here that the angle turned is one revolution  or 2π radians and the time from the question is 0.45 s. Thus the speed is gotten from;

ω = θ/t

ω = 2π radians/0.45 s

ω = 13.96 rad/s

But v = rω

v = 13.96 rad/s * 0.69 m

v = 9.6 m/s

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It would take approximately 546 days for the decay rate of the sample of this radioactive isotope to fall to 0.58 of its initial rate.

1. The decay rate of a radioactive isotope is proportional to the number of radioactive atoms present in the sample at any given time.

2. The decay rate can be expressed as a function of time using the formula: R(t) = R₀ * \(e^{(-\lambda t\)), where R(t) is the decay rate at time t, R₀ is the initial decay rate, λ is the decay constant, and e is the base of the natural logarithm.

3. The half-life of a radioactive isotope is the time it takes for half of the radioactive atoms in a sample to decay. In this case, the half-life is given as 210 days.

4. Using the half-life, we can find the decay constant (λ) using the formula: λ = ln(2) / T₁/₂, where ln(2) is the natural logarithm of 2 and T₁/₂ is the half-life.

5. Substituting the given half-life into the formula, we have: λ = ln(2) / 210.

6. Now, we need to find the time it takes for the decay rate to fall to 0.58 of its initial rate. Let's call this time "t".

7. Using the formula for the decay rate, we can write: 0.58 * R₀ = R₀ * e^(-λt).

8. Simplifying the equation, we get: 0.58 = \(e^{(-\lambda t\)).

9. Taking the natural logarithm of both sides, we have: ln(0.58) = -λt.

10. Substituting the value of λ from step 5, we get: ln(0.58) = -(ln(2) / 210) * t.

11. Solving for t, we have: t = (ln(0.58) * 210) / ln(2).

12. Evaluating the expression, we find: t ≈ 546.

13. Therefore, it would take approximately 546 days for the decay rate of the sample of this radioactive isotope to fall to 0.58 of its initial rate.

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Answer:

\(v=13.1m/s\)

Explanation:

From the question we are told that:

Radius r=13

Coefficient of static friction \mu=0.67

Given the Centripetal concept

Generally the equation for Velocity v is mathematically given by

\(v=\sqrt{\frac{gr}{\mu}}\)

\(v=\sqrt{\frac{9.81*13}{0.67}}\)

\(v=13.1m/s\)

The value of the minimum speed (in m/s) for the cyclist to perform the stunt is Given as

\(v=13.1m/s\)

The equipotential surfaces associated with a point charge are concentric shells.

Charged material experiences a force when it is exposed to an electromagnetic field due to the physical property of electric charge. You can have a positive or negative electric charge.

The equipotential surface is the region where all points with the same potential are located. On the equipotential surface, a charge can be moved from one point to another without exerting any effort.

Thus,a point charge's related equipotential surfaces are concentric shells.

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The picture shown in the figure represents the Milky Way Galaxy. The Galaxy in which the entire solar system is present.

The million and trillion of stars in the universe form Galaxy. The galaxy in which the entire solar system is present is called Milky Way Galaxy. The Milky Way Galaxy is spiral in shape. This Galaxy has four major arms. The major arms have both old and young stars and the minor arms have the gas and star formation activity. This galaxy also has a black hole at its center. Galileo Galilei was the first to see the Galaxy.

The Milky Way Galaxy is made up of a dense cloud of gas that stretches across the sky as seen from the Earth. The age of the Milky Way Galaxy is 13.61 billion years ago and the Andromeda Galaxy is the nearest galaxy to the Milky Way Galaxy.

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The amount of damping force that allow shortest possible time is called​ critical damping of the system.

Critical damping is the threshold between overdamping and underdamping  at which the oscillator returns to the position of equilibrium quickly as possible.

Critical damping is frequently desired because such a system returns to and maintains equilibrium quickly. Furthermore, a constant force applied to a critically damped system moves the system to a new equilibrium position as quickly as possible without overshooting or oscillating around the new position.

Critical damping thus provides the rapid approach to zero amplitude for a damped oscillator.

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Answer:

the required speed/velocity of the stunt double is 13.633 km/h

Explanation:

Given the data in the question;

velocity of train V = 150 km/h

distance = length of train + distance between the tunnel and the end

= 2 km + 20 km = 22 km

first we calculate time t taken by the train to reach the tunnel;

t = distance / velocity

we substitute

t = 22 km / 250 km/h

t = 0.1467 hr

so the velocity of the of the stunt double will be;

velocity = distance / time

we substitute

velocity = 2 km / 0.1467 hr

velocity = 13.633 km/h

Therefore, the required speed/velocity of the stunt double is 13.633 km/h

Answer:

creates the necessary male and female gametes

creates gametes with one set of chromosomes

Explanation:

Meiosis is a type of cell division employed by sexually-reproducing organisms. It produces four genetically different daughter cells that have their chromosome number reduced by half i.e. from diploid (2n) to haploid (n). Meiosis is the process whereby organisms produce their necessary gametes needed for sexual reproduction.

Male organism produces haploid male gametes(n) while female organisms produce haploid female gametes (n). These gametes contain one set of chromosome (haploid) because they have to unite in a process called FERTILIZATION. When they do, they form a diloid zygote (2n), which has the same number of chromosomes as each parent cell. That is n+n= 2n.

Boxcars were composed of wood, which, while robust, reduced their usable lifespan and made them a fire hazard.

Thus, Because of this, wooden boxcars were made illegal in the late 1960s and gradually phased out of train fleets.

The steel frames of the new vehicles made them fire resistant and allowed for the construction of longer vehicles that could carry more cargo. These vehicles often endure 50 years, which is a substantially longer lifespan and boxcars and train.

Prior to the introduction of open-top hoppers and covered hoppers, which made it simpler to load and unload bulk goods, boxcars were utilized for bulk commodities like coal. Before the invention of autoracks in the 1960s, boxcars were used to transport cars, but these held more vehicles in the same amount of space and were easier to use.

Thus, Boxcars were composed of wood, which, while robust, reduced their usable lifespan and made them a fire hazard.

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A. The magnetic dipole moment is 1.643 A*m²

To find the magnetic dipole moment (μ), we can use the formula:

μ = NI*A

where N is the number of turns (in this case, 1), I is the current (93.0 A), and A is the area of the ring.

The area of the ring can be calculated using the formula for the area of a circle (A = πr²)

where r is the radius. Since the diameter is given as 1.50 mm, the radius is 0.75 mm or 0.00075 m.

A = π*(0.00075 m)² ≈ 1.76715×10⁻⁶ m²

Now we can find the magnetic dipole moment:

μ = 1 * 93.0 A * 1.76715×10⁻⁶ m² ≈ 1.643 A*m²

Therefore, the magnetic dipole moment is 1.643 A*m²

B. The on-axis magnetic field strength 5.00cm from the ring is 2.615×10⁻⁴ T

To find the on-axis magnetic field strength 5.00 cm from the ring, we can use the formula:

B = (μ₀μ)/(4πx³)

where μ₀ is the permeability of free space (4π × 10⁻⁷ T*m/A), x is the distance from the ring (0.05 m), and μ is the magnetic dipole moment calculated in Part A.

B = ((4π × 10⁻⁷ T*m/A) * 1.643 A*m²) / (4π*(0.05 m)³) ≈ 2.615×10⁻⁴ T

So, the magnetic dipole moment of the ring is 1.643 A*m², and the on-axis magnetic field strength 5.00 cm from the ring is 2.615×10⁻⁴ T.

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The metal with the highest heat capacity between metals A.25 B.35 C.10 and D.15 is metal A.

Heat capacity is the amount of heat required to raise the temperature of a substance by one degree Celsius. Metal A has a heat capacity of 400 J/kg°C, which means that it takes 400 joules of heat to raise the temperature of one kilogram of metal A by one degree Celsius.

Metal B has a heat capacity of 285.7 J/kg°C, metal C has a heat capacity of 1000 J/kg°C, and metal D has a heat capacity of 666.7 J/kg°C. Therefore, metal A has the highest heat capacity of the four metals.

Metal A's high heat capacity means that it can absorb a lot of heat without its temperature changing very much. This makes metal A a good material for things like heat sinks and thermal insulation.

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Answer:

a) Angular speed(w) = 2.02rad/sec

b) 73J ( It is Inelastic Collision)

Explanation:

Given:

Mass=45kg

Length on each side = 1.5m side which is hangs vertically from a frictionless pivot at the center of its upper edge.

We need to calculate

(a) What is the angular speed and

(b) To know why the angular momentum conserved but not the linear momentum

CHECK THE ATTACHMENT FOR DETAILED EXPLATION

The skater's final angular velocity is approximately 9.86 rad/s.

The skater's final angular velocity can be calculated using the principle of conservation of angular momentum. The equation for angular momentum is given by:

L = Iω

where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.

Initially, the skater has an angular momentum of:

L_initial = I_initial * ω_initial

Substituting the given values:

L_initial = 2.12 kg m² * 3.25 rad/s

The skater's final angular momentum remains the same, as angular momentum is conserved:

L_final = L_initial

The final moment of inertia is given as 0.699 kg m². Therefore, the final angular velocity can be calculated as:

L_final = I_final * ω_final

0.699 kg m² * ω_final = 2.12 kg m² * 3.25 rad/s

Solving for ω_final:

ω_final = (2.12 kg m² * 3.25 rad/s) / 0.699 kg m²

Hence, the skater's final angular velocity is approximately 9.86 rad/s.

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A glass marble has an average volume of about 2 cm3. When discussing the volume of a marble, you want to know how much space the object occupies.

What is the volume of each marble?

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Answer:

plane on edge

Explanation:

All of the following are internal factors that may negatively affect an individual with dementia EXCEPT A. frustration.

Dementia is a medical condition capable of altering individual skills to remember and also to reason during decision-making, which is due to irreversible degeneration of neuronal cells in the brain that lead to a complete state or a false sense of reality in the individual according to the surrounding environmental conditions.

Dementia medical conditions are often associated with aging because they may lead to different degenerative neuronal problems, which must be treated in a proper clinical setting since the person is unable to live in normal conditions on his or her own.

Therefore, with this data, we can see that dementia medical condition that must be treated in clinical medical settings and it is associated with an irreversible loss of neuronal networks in the brain.

Complete question:

All of the following are internal factors that may negatively affect an individual with dementia EXCEPT:

Frustation

Fear and confusion

False beliefs

Fatigue

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The frictional torque of the spinning body is determined as  ( I × 2.1 ) N/m.

Friction torque is the force between two objects that causes one of them to rotate around an axis.

Also, friction torque is the torque caused by the frictional force that occurs when two objects in contact move.

The frictional torque is calculated by applying the following equation as shown below.

τ = Iα

where;

The angular acceleration of the body is calculated by applying the following equation as shown below.

α = Δω / Δt

α = ( ωf - ωi ) / ( t₂ - t₁)

where;

α = ( ωf - ωi ) / ( t₂ - t₁)

ωf = 100 rev/min x 2π rad/rev x 1 min / 60s = 10.5 rad/s

α = ( 10.5 - 0 ) / ( 5 - 0 )

α = 2.1 rad/s²

The frictional torque is calculated as follows;

τ = Iα

τ = ( I × 2.1 ) N/m

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Answer:

12J

Explanation:

Given parameters:

Mass  = 1.5kg

Impulse  = 6kgm/s

 let us start first by find the velocity with which this body moves;

       Impulse  = mass x velocity

         Velocity  = Impulse /  mass  = 6/ 1.5  = 4m/s

Initial velocity  = 0m/s

Unknown:

Resulting kinetic energy  = ?

Solution:

To solve this problem use the formula below:

      K.E  = \(\frac{1}{2}\)  m (v  - u)²  

m is the mass

v is the final velocity

u is the initial velocity

  So;

        K.E  =  \(\frac{1}{2}\)  x 1.5 x (4 - 0)²  

  K.E  = 1.5 x 8  = 12J

Answer:

the lava is and burning like liquid that is from a volcano when it erupt lava

Answer : Newton's first law of motion (also known as Law of Inertia) describes about the tendency of an object to resist change from its state of rest / motion / direction (inertia).

Whereas, Newton's third law of motion tells us that forces exists in pairs. It talks about the action & reaction forces, which are equal in magnitude but opposite in direction.

In this way, Newton's third law of motion is different from Newton's first law of motion.

With a 25.1 m/s2 acceleration, 2,946.19 N of horizontal force is required to push the trunk across the floor to the left.

Usually, the Greek letter mu is used to indicate it (). is mathematically equivalent to F/N, where F denotes frictional force and N is normal force. Due to the fact that F and N are both measured in units of force, the coefficient of friction has no dimensions (such as newtons or pounds).

An object's mass times its acceleration equals the object's net force:

F_net = m * a

The applied force less the frictional force equals the net force acting on the trunk:

F_net = F_applied - F_friction

The force of friction is given by:

F_friction = μ * N

As there is no vertical acceleration of the trunk, its weight is equal to the normal force:

N = m * g

where g is the gravitational acceleration.

When you combine everything, you get:

F_net = F_applied - μ * m * g = m * a

With the applied force factored in, we obtain:

F_applied = m * (a + μ * g)

Plugging in the given values, we get:

F_applied = 105 N * (25.1 m/s^2 + 0.63 * 9.81 m/s^2) = 2,946.19 N

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Explanation:

speed = wavelength * frequency

          = 2 m * .0025/s = .005 m/s

The frictional force involved when a penny sinks to the bottom of a wishing well is primarily due to viscous drag or fluid friction. As the penny moves through the water, it experiences resistance from the surrounding fluid. This resistance is caused by the frictional forces between the water molecules and the penny's surface.

Answer:

Drink water at least every 5 to 20 minutes while exercising in hot weather.

Explanation:

Hope this helps brainliest please

Answer:

D

Explanation:

The Angular Position: The angular position is also called the angular displacement, and it is the angle through which a point revolves around the centre line that has been rotated in a particular manner about a given axis.

The Angular Velocity: The angular velocity of an object is the measure of the speed, or say, how fast an object rotates at one point with respect to a point.

The Angular Acceleration: This is very simple as it's a derivative of angular velocity. They both share the same relationship velocity and acceleration share. Angular acceleration is the rate of change of angular velocity.

The only options that are equal at all points on the rod are;

1. Angular position.

2. Angular velocity.

3. Angular acceleration.

Let us look at each of the options;

1) Angular Position: This is also referred to as angular displacement. In centripetal motion, it is defined as the angle through which a a body has been rotated from the initial position or reference position. This must always be equal at all points on the rod.

2) Angular Velocity: This is defined as the speed with which an object is moving in a circular motion. This must always be equal at all points on the rod.

3) Angular Acceleration: This is simply defined as the rate of change of angular velocity with time. Now, since angular velocity must be equal at all points on the rod, then angular acceleration must also be equal at all points on the rod.

4) Tangential acceleration; This is defined as the rate of change of tangential velocity with time. Tangential velocity is the linear component of the speed and it is not equal at all points on the rod and as such the tangential acceleration will also not be equal at all points on the rod.

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Answer:another answer is ”a light will not transmit thro it”

Explanation:

Ape.x answers

It takes approximately 9.05 seconds to roll the drum a distance of 36 meters.

We can use the formula for the circumference of a circle:

Circumference = 2 * π * radius

Given:

Radius (r) = 0.40 m

Circumference (C) = 2 * π * 0.40 m

We must figure out how many full rotations the drum makes to go 36 meters in order to calculate how long it takes to roll the drum. Since we are aware of the circumference, we can determine the number of full turns as follows:

Number of turns = Distance / Circumference

Given:

Distance = 36 m

Number of turns = 36 m / (2 * π * 0.40 m)

Now that we know how many turns there are, we can calculate the time by multiplying that number by the length of a turn, which is given as 8.0 seconds:

Time = Number of turns * Time per turn

Time = (36 m / (2 * π * 0.40 m)) * 8.0 s

By substituting the values into the equation, we can calculate the time:

Time = (36 / (2 * 3.14159 * 0.40)) * 8.0 s

Time ≈ 9.05 s

So, it takes approximately 9.05 seconds to roll the drum a distance of 36 meters.

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