MCQ
The elasticity of highly elastic body is
a. 1
b. 0
c. 0.5
d. none of them​

The force that causes the protons in an atom to be attracted to one another is Strong nuclear.

Nuclear force is a force that acts between the protons and neutrons of atoms.

Neutrons and protons, both nucleons, are affected by the nuclear force almost identically and it is responsible for the attraction of protons in an atoms.

Thus, the force that causes the protons in an atom to be attracted to one another is Strong nuclear.

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Answer:

C: Valence electrons are transferred from a metal to a nonmetal

Explanation:

In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

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The distance around the rectangular field is 128.88 m.

Perimeter is the total distance around an object.

To calculate the perimeter/ total distance around the rectangular field, we us the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the distance around the rectangular field is 128.88 m.

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Answer:

OC.Newton's third law of motion which states that,"every action has equal and opposite reaction."

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The maximum speed around a level curve is 30. 0 km/h. What is the maximum speed around a curve with twice the radius is 42.4 km/h.

Meaning of the maximum speed curve:

You might travel at a maximum speed of around 1.4 times as fast on a curve with a radius of 60 meters (twice as much), according to the equation, which also states that your maximum speed is proportional to the square root of the curve's radius.

According to that,

30 km/hr is the maximum speed.

New radius equals 2 r

In all scenarios, the centripetal force will be the same.

Calculating the new top speed around a curve is necessary.

Using the centripetal force formula:

\(\frac{mv^{2} }{r} = \frac{mv^{2}}{r}\)

Fill out the formula with the value

\(\frac{v^{2} }{2r} = \frac{30^{2} }{2r}\)

\(v= 30\sqrt{2} \ Km/h\)

The maximum speed around a curve is therefore 42.4 km/h.

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The solenoid contains 0.000102 Joules of magnetic energy.

What is Magnetic Energy?

Magnetic energy refers to the energy stored in a magnetic field. When an electric current flows through a coil of wire, such as in a solenoid or an electromagnet, it generates a magnetic field around the coil. This magnetic field contains energy that is stored in the form of electromagnetic potential energy.

First, let's calculate the inductance (L) of the solenoid using the formula:

L = μ0 * \(N^{2}\) * A / L

where μ0 is the permeability of free space (4π * \(10^{-7}\)T·m/A), N is the number of turns, A is the cross-sectional area of the solenoid, and L is the length of the solenoid.

Given:

N = 1290 turns

A = π *\(r^{2}\), where r is the radius of the solenoid (diameter / 2)

L = 21.2 cm = 0.212 m (converting to meters)

Let's calculate the radius of the solenoid:

Diameter = 1.58 cm = 0.0158 m

Radius (r) = Diameter / 2 = 0.0158 / 2 = 0.0079 m

Now, we can calculate the inductance (L):

L = μ0 * \(N^{2}\) * A / L

L = 4π * \(10^{-7}\) * (\(1290^{2}\)) * (π * (\(0.0079)^{2}\)) / 0.212

L = 4π * \(10^{-7}\) * 1664100 * (3.1416 * 0.00006241) / 0.212

L = 0.004877 Joules

Now, we can calculate the magnetic energy (E):

E = 0.5 * L * \(I^{2}\)

E = 0.5 * 0.004877 * (\(0.165)^{2}\)

E = 0.000102 Joules

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Answer:

B

Explanation:

Energy is neither created nor destroyed, the law of conservation states that.

Answer:

As = 7.33 [m/s]

Explanation:

To solve this problem we must use the definition of the average speed, which is equal to the relationship between the distance over time.

As = x/t

where:

As = average speed [m/s]

x = distance = 132 [m]

t = time = 18 [s]

As = 132/18

As = 7.33 [m/s]

Given differential equation is:

\[\frac{dy(t)}{dt}+y(t)=4x(t)\]

In order to design a circuit to simulate the given differential equation, we can use Operational Amplifiers and its properties. Operational Amplifier has a property that it has infinite input resistance, which means that it will not load the input signal and also it has very high gain, which means it will amplify the signal to a very large extent.

We can use these properties to create a circuit that simulates the given differential equation.The differential equation can be written as:

\[\frac{dy(t)}{dt}=-y(t)+4x(t)\]

Now, taking Laplace Transform of both sides, we get:

\[sY(s)+y(0)=-Y(s)+4X(s)\]

Solving for Y(s), we get:

\[Y(s)=

\frac{4X(s)+y(0)}{s+1}\]

From the above equation, we can see that the Laplace Transform of the output signal is related to the Laplace Transform of the input signal, X(s), by a transfer function that has a pole at s=-1 and a zero at s=0. This suggests that we can create a circuit that has this transfer function by using an Operational Amplifier.In order to create a circuit with the given transfer function.

Now, taking the Inverse Laplace Transform of the above equation, we get:

\[v_{out}(t)=

\frac{R_2}{R_1}e^{-t}

\int_{0}^{t} e^{u}v_{in}(u) du\]

Comparing this with the equation for y(t), we can see that the circuit shown above simulates the given differential equation.

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Answer:

40 V

Explanation:

 I will assume that  the resistors are

           100 and 3900 and 1000 OHMS    <=====(NOT W)

In series , the resistances add together 100 + 3900 + 1000 = 5000 ohms total

V = IR

I = V / R      so the total current will be   200 v / 5000 ohms = .04 amps

                   this is the current through all of the resistors

      so for the   1000 ohm resistor     V = IR     .04 (1000) = 40 V

The open circuit charge, Q, is the charge on the capacitor at a time t open = 635 s after the switch was opened (t open).

The charge on the capacitor at a time t open = 635 μs after the switch was opened, is known as the open circuit charge, Q(t open). This charge can be calculated using the equation Q(t open) = Q(t close)e^(-RC t open), where Q(t close) is the charge on the capacitor at the time the switch was closed, R is the circuit resistance, and C is the capacitance. Substituting in the given values gives Q(t open) = Q(t close)e^(-RC635 μs), which is the charge on the capacitor 635 μs after the switch was opened.

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Answer:

5 km/h

Explanation:

distance divided by time

Nicki rides her bike at a constant speed for 6 km. That part of her ride takes her 1 hour. She then rides her bike at a constant speed for another 9 km. That part of her trip takes her 2 hours. Her average speed is 5m/s

Based on the given conditions, formulate: \((9+6) \div($ $2+1)$\)

Calculate the sum or difference: \($\frac{15}{2+1}$\)

Calculate the sum or difference: \($\frac{15}{3}$\)

Reduce the fraction: 5 m/s

get the result: 5 m/s

What is average speed?

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Answer:

5400N.s

Explanation:

lmpuls=force ×time

force =180N

time=30s

impulse =180×30=5400N.s

When turning a water wheel by hand to generate current, the wheel would resist motion due to Lenz's Law, which states that the induced EMF opposes the change in the magnetic field. In a transformer with a 2:1 step-up ratio, the output voltage is doubled, but it is not free energy as the transformer operates based on energy conservation principles.

Lenz's Law states that the induced electromotive force (EMF) opposes the change in the magnetic field. When turning a water wheel by hand to generate current, the wheel would resist motion due to Lenz's Law, as the induced EMF would create a magnetic field opposing the applied force.

In Faraday's Law (emf_max = NABω), the variables are defined as follows:

N: Number of turns in the coil

A: Area of the coil

B: Magnetic field strength

ω: Angular frequency of the changing magnetic field

N represents the number of turns in the coil and affects the magnitude of the induced EMF. A larger number of turns (N) would result in a higher induced EMF.

A refers to the area of the coil, and a larger coil area (A) would result in a higher induced EMF.

B represents the magnetic field strength, and a stronger magnetic field (B) would result in a higher induced EMF.

ω is the angular frequency of the changing magnetic field, and a higher angular frequency (ω) would result in a higher induced EMF.

In a transformer with a 2:1 step-up ratio (500 loops in the primary, 1000 loops in the secondary), the voltage is doubled in the output. However, this is not free energy as the transformer operates based on the principle of energy conservation, transferring electrical energy from the primary to the secondary coil with losses due to factors like resistance and magnetic hysteresis.

When the polarity of a moving magnet in a coil is flipped, the induced EMF changes direction, resulting in an increase or decrease depending on the relative motion of the magnet and the coil.

To determine the coil-turn ratio of a transformer with a power output of 100 W, input voltage of 25V, and output current of 1.0 A, we can use the formula:

Power output = Power input

Power input = Voltage input * Current input

Power output = Voltage output * Current output

Substituting the given values:

100 W = 25 V * Current input

Current input = 100 W / 25 V

Current input = 4.0 A

The coil-turn ratio is then calculated using the formula:

Coil-turn ratio = Voltage output / Voltage input

Coil-turn ratio = Current input / Current output

Coil-turn ratio = 4.0 A / 1.0 A

Coil-turn ratio = 4:1

Therefore, the coil-turn ratio of the transformer is 4:1.

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Answer:

When a twirling ice skater brings her arms inward, her rotational speed increases.

Explanation:

The principle of conservation of angular momentum says that the angular momentum of a spinning object remains constant, unless the object is acted upon by an external torque. Angular momentum is the product of the object's rotational speed and its moment of inertia. This means rotational speed and moment of inertia are inversely proportional when angular momentum is constant.

The moment of inertia increases with the distance the object's mass lies from its center of rotation. When a spinning skater brings her arms closer to her body, her mass is brought closer to the center of rotation, decreasing her moment of inertia. Friction from the ice and the air do not apply much torque to the skater, so her angular momentum is nearly constant. Thus, her decreasing moment of inertial results in increasing speed of rotation.

Answer:

Explanation:

F = ma

m = F/a

m = 107.2/1.6 = 67 kg

so Naoki's mass must be the total mass - mass of the bike

so her mass is 67 - 9 = 58 kg...B

The force provided by the cannon to launch a 3.2 kg cannonball at rest with a speed of 6.0 m/s in 0.55 seconds is 34.88 N.

To determine the force, we'll first need to find the acceleration of the cannonball using the formula:

final velocity (vf) = initial velocity (vi) + acceleration (a) * time (t).

Then, we'll use Newton's second law of motion (F = m * a) to find the force.

Step 1: Calculate the acceleration.
Given: vi = 0 m/s (cannonball at rest), vf = 6.0 m/s, t = 0.55 seconds
Formula: vf = vi + a * t
Rearranging the formula: a = (vf - vi) / t

Step 2: Plug in the given values.
a = (6.0 m/s - 0 m/s) / 0.55 seconds
a = 6.0 m/s / 0.55 seconds
a ≈ 10.9 m/s²

Step 3: Calculate the force using Newton's second law of motion.
Given: mass (m) = 3.2 kg, acceleration (a) ≈ 10.9 m/s²
Formula: F = m * a

Step 4: Plug in the given values.
F = 3.2 kg * 10.9 m/s²
F ≈ 34.88N

Thus, the force provided by the cannon is approximately 34.88 N.

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Answer:

Hope it helped brainiest plz and thank you!!!!!!1

Explanation:

3. If humans could unleash genetic modifications upon mosquitos that would eradicate the species entirely, should they do it?

No, they should not eradicate the mosquitos because they are part of the food chain for some animals.

Answer:

67.56kg

Explanation:

Fapp+mg = ma

Fapp= applied force

mg = reactional force

g = acceleration due to gravity

Where g = 9.8m/s^2 a= 5 m/s2, Fapp= 1000N.

1000N = ma + mg

1000N = m( a+g )

1000N = m ( 5+9.8)

1000N = m×14.8

m = 1000÷14.8

m = 67.56kg.

Hence the mass of the wagon will be 67.56kg

Explanation:

las respuestas están en la foto de arriba

The equilibrium of the small plastic ball hanging between the plates of a capacitor can be analyzed using the principles of electrostatics. To find the magnitude of the charge on each plate, we can use the following steps:

1. Calculate the weight of the ball using the formula W = mg, where m is the mass of the ball and g is the acceleration due to gravity. In this case, the mass is given as 5.56× 10^3 kg and the acceleration due to gravity is approximately 9.8 m/s^2.

2. Determine the tension in the thread. Since the ball is in equilibrium, the tension in the thread must balance the weight of the ball. The tension in the thread can be calculated using the component of the weight in the vertical direction, which is given by T = mg cosθ, where θ is the angle the thread makes with the vertical. In this case, θ is given as 30.0°.

3. Find the electric field strength between the plates of the capacitor. The electric field strength can be calculated using the formula E = F/q, where F is the force acting on the charged ball and q is the charge on the ball. The force acting on the charged ball is equal to the tension in the thread, so we can substitute T for F in the formula. The value of q is given as 0.196 µC.

4. Calculate the magnitude of the charge on each plate. The magnitude of the charge on each plate is equal to the product of the electric field strength and the area of each plate. In this case, the area of each plate is given as 0.01805 m².

By following these steps, you can find the magnitude of the charge on each plate. Make sure to carry out the calculations accurately and use the correct units throughout the process.

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The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.

d (distance) from A to B is = √2gh

In this case given are, g = 9.8 m/s² and h = 100m,

so here d = √(2⋅9.8⋅100) = 44.3m.

Final velocity ,v = √2gh

Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,

g = 9.8 m/s² ,h = 100m,

v = √(2⋅9.8⋅100)

= 44.3 m/s (final velocity)

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Answer:

Superficial:  Occurring at or on the surface; shallow.

If your describing a person it means that they don't think deeply, and they have shallow understanding of anything serious or important.

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Max Planck showed that when atoms and molecules emit energy, it comes in discrete amounts or quanta.

Max Planck (1858-1947) was a German physicist who is best known for his work in the field of quantum mechanics. He is considered one of the founders of quantum theory and made significant contributions to the understanding of atomic and subatomic processes.

In 1900, Planck proposed the idea that energy is emitted in discrete packets or quanta, rather than in a continuous stream. This idea became the basis for his famous equation, E=hv, where E is the energy of a quantum, h is Planck's constant, and v is the frequency of the radiation. Planck's work revolutionized the field of physics and laid the groundwork for many important discoveries, including the development of the theory of relativity by Albert Einstein.

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Electric field refers to the area around the charged particle in which it affects other charged particles. The electric field magnitude at point P will be  3 × 10⁻⁶ N/C.

The electric field can be measured in volts per meter (V/m) or newtons per coulomb (N/C).

There are two types of electric fields which are as follows: Uniform electric field & Non-uniform electric field.

We can find the magnitude of the electric field by using the formula as follows: |E| = kq/d²;

where k = 9 × 10⁹ Nm²/C², q = charge on wire, and d = distance between point P and wire.

So, the magnitude of the electric field these wires produce at point P, which is 60.0 cm from each wire is:

|E| = kq/d²|E| = 9 × 10⁹ Nm²/C² × (1.8 × 10⁻⁶ C)/(0.6 m)²

|E| = 3 × 10⁻⁶ N/C.

Thus, the magnitude of the electric field these wires produce at point P, which is 60.0 cm from each wire is 3 × 10⁻⁶ N/C.

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Answer:

Big Q represents the source charge which creates the electric field. Little q represents the test charge which is used to measure the strength of the electric field at a given location surrounding the source charge.

The source charge, or Big Q, is what generates the electric field. Little q stands for the test charge, that is used to gauge the intensity of the electromagnetic field around the source charge at a certain position.

Charged material experiences a force when it is exposed to an electromagnetic field because of the physical characteristic of electric charge.

You can have a positive or negative electric charge. Unlike charges attract one another, while like charges repel one another. Neutral refers to an object that carries no net charge.

Classical electrodynamics, the name given to early understanding of how charged particles interact, is still accurate for issues that do not call for taking into account quantum phenomena.

Electric current is a conserved attribute, meaning that the net charge—that is, the sum of the positive and negative charges in an isolated system—cannot change.

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a. The object having weight 700N in air, experiences buoyancy force of 200N in water.

b. The density of the object is 3.5g/cm3

a. Archimedes Principle:

When a body is partially or fully immersed in a fluid, its weight appears to decrease and apparent decrease in its weight is equal to weight of the fluid displaced by the body.

The object weight in air is 700N and it's weight in water is 500N.

Buoyancy force = Apparent loss of weight

= 700N - 500N

= 200N

b. Density of the object:

Buoyancy force = Vdg ( where v is volume of the object, d is the density of liquid and g is gravity of earth)

200 = Vdg

200 = V × 1000 × 10 (density of water= 1000kg/m3)

V = 2/100

m/d = 2/100 (V = m/d ,where d is density of solid)

(mg = 700N given in question)

(m = 70)

d = 70× 100/2

d = 3500kg/m3

= 3.5g/cm3

hence density of the object is 3.5g/cm3

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The frame of reference you are operating in determines the momentum. The overall momentum will be 0 if you operate in a frame of reference where the center of mass is stationary.

a bomb before explosion does mot have any kind of external forces, and here we see how the momentum does not affected by before Collison.

According to the law of conservation of momentum, the combined momentum of objects that interact stays constant. This implies that the overall momentum prior to  explosion equals the total momentum following a  explosion.

P = mv determines an object's momentum prior to impact.

Its velocity and momentum are unaffected in the absence of an external force prior to the impact.  

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a. The electric flux through each of the six faces of the cube is zero.

To answer this question, we must use Gauss' Law.

The electric flux is calculated as follows:

Adding all of these values together, we see that the electric flux through the cubical surface is zero,

as Gauss' Law predicts, since there is no net charge within the cube.

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