Q.3 There is two conductors A and B of same
material having lengths L and 2L and radii r and
r/2 respectively. What is the ratio of their
resistance?​

Answer:The percentage of the work input that becomes work output is the efficiency of a machine. Because there is always some friction, the efficiency of any machine is always less than 100 percent.

Explanation:

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Answer:

As the pressure inside the pressure cooker increases as it is heated, the temperature also increases.

Explanation:

A pressure cooker contains water and steam in equilibrium at a pressure greater than atmospheric pressure.

According to the ideal gas law, as the pressure increases, the temperature also increases.

As the pressure inside the pressure cooker increases as it is heated, the temperature also increases.

Answer:

see below

Explanation:

In chickenpox vaccine , weakened/killed pathogens are introduced into the body to generate immune response. The first response is slow and is called primary response while the subsequent exposure with the same pathogen generates a highly intensified immune response which is known as secondary response .

This type of immunity which generates antibody against the virus particles by introducing them into the body is called active immunity . It lasts forever in the body as the immune system has the memory of first exposure with the pathogen and after coming in contact with the same pathogen it recognises it and generates immune response.

So the correct option would be,

\(\rule{200}2\)

Related information:-

Passive immunity:-

It is the type of immunity when performed antibodies are introduced in the body . Like in case of smallpox. This doesn't last long in the body and requires repeated infusions in the body after coming in contact with the same pathogen again.

Also , it is helpful when quick reponse is required against the antigen and we don't have time to wait for generating immune response like in case of snake bites .

Answer: 22 hours 15 minutes

Explanation: The calculated flying distance from New York City to Dallas is equal to 1371 miles which is equal to 2206 km. If you want to go by car, the driving distance between New York City and Dallas is 2492.32 km. If you ride your car with an average speed of 112 kilometers/hour (70 miles/h), travel time will be 22 hours 15 minutes.

Hi there!

Part A:

The only quantities explicitly given to us are:

3. mass (m)

4. Maximum velocity (vmax)

5. Amplitude (A)

8. Position x from equilibrium

Part B:

To solve, we must begin by calculating the force constant, 'k'.

We can use the following relationship:

\(v = \sqrt{\frac{k}{m}(A^2-x^2)\)

We are given the max velocity which occurs at a displacement of 0 m, because the mass is the fastest at the equilibrium point. We can rearrange the equation for k/m:

\(\frac{v^2}{(A^2-x^2)} = \frac{k}{m}\)

\(\frac{3.2^2}{(0.06^2-0)} = \frac{k}{m} = 2844.44\)

Now, we can find the velocity at 4.7cm (0.047m) using the equation:

\(v = \sqrt{(2844.44)(0.06^2-0.047^2)} = 1.989 m/s\)

Plug this value into the equation for kinetic energy:

\(KE = \frac{1}{2}mv^2\\\\KE = \frac{1}{2}(0.05)(1.989^2) = \boxed{0.0989 J}\)

Part C:

The potential energy of a spring is given as:

\(U = \frac{1}{2}kx^2\)

Find 'k' using the derived quantity above:

\(\frac{k}{m} = 2844.44\\\\k = 2844.44m = 142.22 N/m\)

Now, calculate potential energy:

\(U = \frac{1}{2}(142.22)(0.047^2) = \boxed{0.157 J}\)

The property that is oscillating would be the electric and magnetic fields.

For light, the property that is oscillating or vibrating at a particular frequency is the electric and magnetic fields.

Light is an electromagnetic wave, which means that it consists of oscillating electric and magnetic fields that are perpendicular to each other and to the direction of wave propagation.

The frequency of the wave corresponds to the number of complete oscillations of the electric and magnetic fields that occur per second, and is measured in hertz (Hz).

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Reflection of light is when light waves bounce off a surface.

Reflection occurs when light traveling through one material bounces off a different material. The reflected light continues to travel in a straight line, but in a different direction.

The incident light ray that land on the surface is called the reflected off the surface while the ray that bounces back is called the reflected ray.

For example, if an individual looks at a bird, light has reflected off that bird and traveled in nearly all directions. If some of that light enters the individual's eyes, it hits the retina at the back of the eyes. An electrical signal is passed to the person's brain, and the brain interprets the signals as an image.

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The East/West component of SuperPointParticleDog's force on the ball is -115.7 N. (Westward).

Isaac's force:

Magnitude: 255 N

Angle: 13 degrees North of East

x-component: 255*cos(13) = 245.1 N (Eastward)

y-component: 255*sin(13) = 58.1 N (Northward)

Newton's force:

Magnitude: 156 N

Angle: 34 degrees South of East

x-component: 156*cos(34) = 129.4 N (Westward)

y-component: 156*sin(34) = 86.5 N (Southward)

Now we can add the x- and y-components of the forces to find the net force:

Net force:

x-component: 245.1 N - 129.4 N = 115.7 N (Eastward)

y-component: 58.1 N - 86.5 N = -28.4 N (Southward)

The net force has an Eastward component of 115.7 N. Therefore, the East/West component of SuperPointParticleDog's force on the ball is -115.7 N. (Westward).

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Using the kinematic equation:

v = vo + at

where v is the final velocity, vo is the initial velocity (which is zero since the cotton ball is dropped), a is the acceleration, and t is the time.

At t = 1.00 s:

v = 0 + (-9.81 m/s²) (1.00 s) = -9.81 m/s

However, there is air resistance acting on the cotton ball, so the acceleration will be less than -9.81 m/s². We don't have enough information to calculate the exact acceleration, but we can eliminate choices A and B because they have an acceleration greater than -9.81 m/s².

For choice C:

v = 0 + (-4.90 m/s²) (1.00 s) = -4.90 m/s

For choice D:

v = 0 + (-4.90 m/s²) (1.00 s) = -4.90 m/s

Therefore, the correct answer is D. v = 2.55 m/s, a = 0.00 m/s².

Answer:

Explanation:

Answer:

Speed of water at the top of fall = 5.40 m/s

Explanation:

We have equation of motion

Here final velocity, v = 26 m/s

a = acceleration due to gravity

displacement, s = 33 m

Substituting

Speed of water at the top of fall = 5.40 m/s

Answer:

Workdone = 113778 Joules

Explanation:

Given the following data;

Force = 903N

Distance = 126m

To find the workdone;

Workdone = force * distance

Substituting into the equation, we have

Workdone = 903 * 126

Workdone = 113778 Joules

Therefore, the amount of work, in joules, the gravity did on the asteroid is 113778.

The well that will have most of the water will be well A.

The underground water supply is defined as a type of water that exists underground in saturated zones beneath the land surface.

From the two wells represented in the diagrams above, Well A has water supply from underground which is lacking in well B.

Therefore, well A will have most of the water more than B.

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The expression for the magnitude of the acceleration of the box is a = (170 - Ff)/m

The magnitude of the acceleration of the box at the applied force is the rate of change of the velocity of the box with time.

Mathematically, the formula for acceleration of any object is given as;

a = Δv/Δt

where;

The magnitude of the acceleration of the box if you push on the box with a constant force 170.0 N that is parallel to the ramp surface and directed up the ramp, can be calculated using Newton's second law of motion as follows;

F - Ff = ma

where;

170 - Ff = ma

a = (170 - Ff)/m

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Answer:

I believe that number 1 is correct I am not sure about the others

Sorry for not being more helpful

Explanation:

Answer:

All your answers are correct

Explanation:

I took the test and got a 100

A free-body diagram of the block on the frictional part of the surface would show the force of friction acting in the opposite direction to the velocity of the block, and the force of gravity acting downward.

Using conservation of energy, the speed of the block at the base of the ramp can be found by setting the initial kinetic energy of the block (1/245^2) equal to the final kinetic energy of the block (1/2mv^2) and solving for v. v = sqrt((1/245^2)/(1/2*m)) where m is the mass of the block.

Using conservation of energy, the maximum vertical height H of the block on the ramp can be found by setting the initial potential energy of the block (mgH) equal to the final kinetic energy of the block (1/2mv^2) and solving for H. H = (1/2mv^2)/(m*g)

a) The total impulse given to the mass on the spring (mass A) during the brief collision is the product of the force exerted on the mass by the block and the time duration of the collision.

b) The speed of the mass on the spring (mass A) immediately after the collision can be determined using the conservation of momentum.

c) The velocity of the block immediately after the collision can also be determined using the conservation of momentum.

d) The spring constant can be determined by using the equation k = (2*F)/x, where F is the force exerted on the spring and x is the compression of the spring.

To find the horizontal range of the block from the end of the ramp, we can use the equations for horizontal and vertical motion of a projectile, with the angle of launch being 30 degrees, the initial speed being 6 m/s, and the final vertical position being 1m above the end of the ramp.

The formula you mentioned is known as the dot product formula or the scalar product formula. It is used to find the angle between two vectors u and v.

Let's start by defining the vectors u and v. Suppose we have two vectors u and v in a two-dimensional space.

u = (u1, u2)

v = (v1, v2)

The dot product of these vectors is defined as:

u . v = |u| |v| cos(β)

where |u| and |v| are the magnitudes of the vectors u and v respectively, and β is the angle between the vectors u and v.

Now, let's derive this formula. The dot product of two vectors u and v is given by:

u . v = (u1 × v1) + (u2 × v2)

The magnitude of a vector is given by:

|u| = sqrt(u1² + u2²)

|v| = sqrt(v1² + v2²)

We can use the dot product and magnitude equations to obtain:

cos(β) = (u . v) / (|u| × |v|)

Multiplying both sides by |u| × |v| gives us:

|u| × |v| × cos(β) = u . v

Therefore, we have derived the dot product formula:

u . v = |u| × |v| × cos(β)

This formula can be used to find the angle between two vectors u and v in any two-dimensional or three-dimensional space.

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The complete question is-

Write the proof of the formula

u.v=|u||v|cosβ

a) The final pressure and temperature for the isothermal compression are \(4.5*10^5 Pa\) and 293 K, respectively, while  b) the final pressure and temperature for the adiabatic compression are\(5.58*10^5 Pa\) and 515 K, respectively.

a. Isothermal compression:

For an isothermal process, the temperature remains constant. Therefore, we can use the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature.

Since the process is isothermal, we can write:

\(P_1V_1 = P_2V_2\)

where P1 and V1 are the initial pressure and volume, and\(P_2\)and\(V_2\)are the final pressure and volume.

We are given that the volume is compressed to 1/3 of its original volume, so\(V_2 = (1/3)V_1\). Substituting this into the equation above gives:

\(P_2 = (V_1/V_2)P_1 = 3P_1\) = \(4.5*10^5 Pa\)

To find the final temperature, we can use the ideal gas law again:

PV = nRT

Rearranging, we get:

T = PV/(nR)

Substituting the values we know, we get:

T = (\(1.5*10^5\)Pa)(V1)/(nR)

Since the process is isothermal, the temperature remains constant, so the final temperature is the same as the initial temperature:

T2 = T1 = 293 K

b. Adiabatic compression:

For an adiabatic process, there is no heat transfer between the gas and its surroundings. Therefore, we can use the adiabatic equation:

PV^γ = constant

where γ = Cp/Cv is the ratio of specific heats.

Since the process is adiabatic and reversible, we can write:

\(P_1V_1\)^γ = \(P_2V_2\)^γ

We are given that the volume is compressed to 1/3 of its original volume, so V2 = (1/3)V1. Substituting this into the equation above gives:

\(P_2 = P_1(V_1/V_2)\)^γ = \(P_1\)\((3)^{(1.4)\) = \(5.58*10^5 Pa\)

To find the final temperature, we can use the adiabatic equation again:

\(T_2 = T_1(P_2/P_1)\)^((γ-1)/γ) = T1(5.58/1.5)^(0.4) = 515 K

Therefore, the final pressure and temperature for the isothermal compression are \(4.5*10^5 Pa\)and 293 K, respectively, while the final pressure and temperature for the adiabatic compression are \(5.58*10^5\) Pa and 515 K, respectively.

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Answer:

The answer is number three forces acting on a sled are paired with equal and opposite forces

A person is sitting on a sled and someone is about to push them down a hill, Forces acting on the sled are paired with equal and opposite forces. The correct option is option (c).

As defined by Newton's third law of motion, when a person sits on a sled and is pushed down a hill, the force exerted by the person on the sled is coupled with an equal and opposite force exerted by the sled on the person. This is an example of action-reaction forces with equal magnitude and opposing directions.

Therefore, The correct option is option (c).  Forces acting on the sled are paired with equal and opposite forces.

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The methods to determine the specific charge of an electron are The J. J. Thomson Method and The Millikan Oil Drop Method.

The J. J. Thomson Method

In this method, an electric field is created between two parallel metal plates. Electrons are accelerated by this field from the negative plate to the positive plate. After that, they strike a fluorescent screen. When the electrons are shot through the electric field perpendicular to the magnetic field, they experience the Lorentz force, which is given by the formula: $F= evB$ $F= evB$

When a magnetic field is applied at right angles to an electron beam, it bends the path of the beam into a circular path. The radius of the path of an electron beam in a magnetic field is determined by the relationship:r = mv/eB. As a result, the specific charge of an electron may be calculated from the expression: $e/m = 2V / B^2r^2$

The Millikan Oil Drop Method

This is another technique for determining the specific charge of an electron. The oil drop experiment was first done by Robert A. Millikan in 1909. He did this experiment by suspending charged droplets of oil in a uniform electric field between two parallel plates.

The fall of the oil droplets in the absence of an electric field was also noted. The fall velocity of the oil droplet was determined by measuring the time taken by the oil droplet to pass through a fixed distance between the plates in the absence of an electric field. By measuring the electric field strength, the voltage applied to the plates, and the fall velocity of the oil droplet, the specific charge of the electron was determined.

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The methods to determine the specific charge of an electron are :

In the J. J. Thomson Method, an  electric field is created between two parallel metal plates. Electrons are accelerated by this field from the negative plate to the positive plate. After that, they strike a fluorescent screen.

When the electrons are shot through the electric field perpendicular to the magnetic field, they experience the Lorentz force.

The Millikan Oil Drop Method is an experiment by which is created by suspending charged droplets of oil in a uniform electric field between two parallel plates.

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Answer:

a protective and waxy or hard layer covering the epidermis of a plant, invertebrate, or shell.

Answer:

The cuticles for animals are a thin layer of clear dead skin around the nail bed on fingers and toes. As the nail grows, it naturally pushes and damages the underside of the skin around the base of the nails, called the eponychium. The space between the eponychium and the bottom of the nail is where the cuticle is located.  

The cuticle definition related to plants is a protective and waxy or hard layer covering the epidermis. The plant cuticle is an extracellular hydrophobic layer that covers the aerial epidermis.

Explanation:

The Normal force = 302.63 N

Friction Force = 115 N

u*Normal force= friction,

u= 0.38,

N= 115/0.38

Therefore, the Normal force = 302.63 N

Mass is a fundamental feature of matter that quantifies the amount meaningful in an object. It is typically calculated in units of kilograms (kg) or grams (g). Mass is various from weight, that depends on the gravitational force pursuing an object, while mass debris constant although gravity.

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Vehicles need to be serviced for several reasons such as preventing costly repairs and improving fuel economy.

First, regular maintenance can help to prevent costly repairs down the road. Second, maintenance can help to improve fuel economy and emissions. Third, maintenance can help to keep your vehicle safe and reliable.

The servicing requirements for petrol/diesel and electric vehicles differ in a number of ways. Petrol/diesel vehicles require oil changes more frequently than electric vehicles. This is because petrol/diesel engines use oil to lubricate the moving parts, while electric motors do not. Petrol/diesel vehicles also require tune-ups more frequently than electric vehicles.

This is because petrol/diesel engines have more moving parts that need to be synchronized, while electric motors have fewer moving parts.

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Answer:

False.

Explanation:

Decibels (dB) measure sound levels

Answer: F

Explanation: the pulsation caused by the combination of two waves of slightly different frequencies.

The answer you are looking for is S=D/T, which is the formula.

It is also read as Speed=Distance/Time, or Speed=Distance divided by Time.

The "S" stands for "Speed."

The "D" stands for "Distance."

The "T" stands for "Time."

I hope this has helped answer your question. Enjoy your day, and take care.

Answer:

The formula is S=D/T.

Explanation:

Answer:

25 meter per second square

Answer:

\(F = ma = 0.1 \times a \\ a = \frac{5}{0.1} \\ a = 50 \: m. {s}^{ - 2} \)

The tension in the cord is 5.11 N.

Given the information, we can calculate the wave speed by using the formula

wave speed = distance/time. In this case, the distance is 7.3 m and the time is 0.83 s, so we have:

wave speed = 7.3 m / 0.83 s = 8.77 m/s

Next, we can use this wave speed to calculate the wave frequency using the formula

wave frequency = wave speed/wavelength. The wavelength can be determined by considering the tension in the cord, which acts to restore it to its original length. The tension can be calculated using the formula

tension = (mass/length) x acceleration, where the acceleration is the acceleration due to gravity \((9.8 m/s^2)\). Therefore, we have:

tension =\((0.49 kg / 7.3 m)\times 9.8 m/s^2\)= 5.11 N

Complete question:

A 0.49-kg cord is stretched between two supports,7.3m apart. When one support is struck by a hammer, a transverse wave travels down the cord and reaches the other support in 0.83s .What is the tension in the cord? (Express your answer to two significant figures and include the appropriate units)

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Answer:

The displacement of the spring is 0.12 m.

Explanation:

Given;

spring constant, k = 25 N/m

mass attached to the spring, m = 0.300 kg

displacement of the spring, x = ?

Apply Hook's law, weight of the mass attached (applied force) is directly proportional to the extension of the spring.

F = kx

mg = kx

0.3 x 9.8 = 25x

2.94 = 25x

x = 2.94 / 25

x = 0.12 m

Therefore, the displacement of the spring is 0.12 m.