if a motorcycle with a mass of 250 kg has a kinetic energy of 200,000 j, what is the motorcycle's speed in m/s?

Increasing the frequency of supply will decrease the current through the inductor.

When an inductor is connected to an ac supply, it develops a resistance known as inductive reactance.

The inductive resistance/reactance(XL) is given by the following formula

XL = ω X L

As  ω =2πf

XL = 2πf x L

Where ω is the angular frequency and f is the frequency of the AC supply.

When the frequency of AC supply is increased i.e, f is increased, the inductive reactance (XL) is also increased because it is directly proportional to the frequency.

As the resistance of the inductor is increased, the current through it will decrease.

Thus, increasing the frequency of supply will decrease the current through the inductor.

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Answer: 50%

Explanation: The sun and the moon go around Earth and The sun is way bigger than the moon so 50% of the sun lights up the moon at night

Answer:

50%

Explanation:

Answer:

51.54 m/s

Explanation:

Applying,

Law of conservation of momentum,

Total momentum before collision = Total momentum after collision

mu+m'u' = mv+m'v'.................... Equation 1

Where m = mass of the head of the golf club, m' = mass of the gulf ball, u = initial velocity of the head of the gulf club, u' = initial velocity of the gulf ball, v = final velocity of the head of a gulf club, v' = final velocity of the gulf ball

From the question,

Given: m = 151 g = 0.151 kg, u = 43.9 m/s, m' = 46 g = 0.046 kg, u' = 0 m/s (at rest), v = 28.2 m/s

Substitute these values into equation 1

0.151(43.9)+0.046(0) = 0.151(28.2)+0.046(v')

solve for v'

6.6289+0 = 4.2582+0.046v'

0.046v' = 6.6289-4.2582

0.046v' = 2.3707

v' = 2.3707/0.046

v' = 51.54 m/s

By using this formula =Diameter = Diameter = Known Field Diameter × (Known Magnification / Unknown Magnification)
, you can calculate the diameter of an unknown microscope field, allowing you to estimate the size of the objects you're observing under different magnification levels.

.To calculate the diameter of an unknown microscope field, you can use the formula:

Unknown Field Diameter = Known Field Diameter × (Known Magnification / Unknown Magnification)

Here's a step-by-step explanation of the formula:

1. Determine the known field diameter: This is the diameter of the field of view under a certain magnification, which is usually provided by the microscope manufacturer or can be measured experimentally.

2. Determine the known magnification: This is the magnification level at which the known field diameter was measured.

3. Determine the unknown magnification: This is the magnification level at which you want to calculate the unknown field diameter.

4. Plug the values into the formula and solve for the unknown field diameter.

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Answer:

d//

Explanation:

there is a total fat content of 8 grams

Answer:

D

Explanation:

Answer:  Therefore, the magnitude of the magnetic field is 5.24 × 10^-9 T and its direction is into the page.

Explanation:   The force on a charged particle moving through a magnetic field is given by the formula F = qvB, where F is the force, q is the charge, v is the velocity of the particle, and B is the magnetic field strength.

In this problem, the particle has a charge of -1.9 × 10^-6 C and is traveling with a velocity of 8.1 × 10^3 m/s. The force acting on the particle is perpendicular to both the velocity vector and the magnetic field vector. Therefore, the force acting on the particle is responsible for the circular motion of the particle, and the radius of the circle is related to the velocity, magnetic field, and the mass of the particle.

The radius of the circular path can be calculated using the formula R = mv/qB, where m is the mass of the particle, v is the velocity of the particle, q is the charge on the particle, and B is the magnetic field strength.

Plugging in the given values, we get:

R = (3.1 × 10^-12 kg) × (8.1 × 10^3 m/s) / (-1.9 × 10^-6 C × B)

Simplifying, we get:

R = - 13.11 m^2 / (C kg s B)

Rearranging the terms, we get:

B = - 13.11 m^2 / (C kg s R)

Plugging in the given values, we get:

B = - 13.11 m^2 / (C kg s × 0.05 m) = - 5.24 × 10^-9 T

The magnitude of the magnetic field is 5.24 × 10^-9 T.

The direction of the magnetic field can be found using the right-hand rule. If we point our right thumb in the direction of the velocity vector and our fingers in the direction of the magnetic field vector, then the direction of the force vector is perpendicular to both and can be found using our right hand. In this case, the force vector points upward, so the magnetic field must point into the page (i.e., in the negative z-direction).

In this circuit, when the switch is opened at t=0, the current through the inductor gradually decreases over time, causing a voltage to develop across the inductor and a corresponding drop in the voltage across the resistor.

Based on the given information, we can draw the following circuit diagram:

    +-----R-----+

Vs --|            |

    |            +---> vr

    |            |

    +----L-----x--+  

                  |

                 ---

                 --- ix

                  |

                 GND

where

Before the switch is opened at t=0, the circuit is in steady-state, which means that the current through the inductor is constant and there is no voltage across the inductor. When the switch is opened at t=0, the current through the inductor cannot change instantaneously, so it will continue to flow in the same direction but will gradually decrease over time.

As the current decreases, a voltage will develop across the inductor, which will oppose the change in current.

To solve for ix and vr for t>0, we can use the differential equation that describes the behavior of the circuit:

\(L(di/dt) + R\times i = Vs\)

where

Taking the derivative of both sides with respect to time, we get:

\(L(d^2i/dt^2) + R(di/dt) = 0\)

This is a second-order linear homogeneous differential equation with constant coefficients. The characteristic equation is:

\(Lr^2 + Rr = 0\)

which has two roots:

The general solution to the differential equation is therefore:

\(i(t) = Ae^{(r1t)} + Be^{(r2t)}\)

\(= A + Be^{(-R/L\times t)}\)

where

A and B are constants that depend on the initial conditions.

To solve for A and B, we can use the initial conditions at t=0. Before the switch is opened, the current through the inductor is constant, so we have:

\(i(0-) = i(0+) = ix\)

After the switch is opened, the voltage across the inductor is zero, so we have:

\(vL(0+) = 0\)

Using Ohm's law, we can write:

\(vR = iR\)

where

vR is the voltage across the resistor, which is equal to vr.

Therefore, we have:

\(vr = iR = (di/dt)\times R\)

Taking the derivative of the equation for i(t), we get:

\(di/dt = -B\times (R/L)e^{(-R/Lt)}\)

Using the initial condition vL(0+) = 0, we can write:

\(vL = L(di/dt)\)

Substituting in the expression for di/dt and integrating with respect to time, we get:

\(vL = -BR/L \times (e^{(-R/L\timest)} - 1)\)

Using the fact that vL = 0 at t=0+, we can solve for B:

B = ix*R/L

Substituting this expression for B into the equation for i(t), we get:

i(t) = ix + (Vs/R - ix)e^(-R/Lt)

This matches the given expression for i(t), so we can confirm that:

To solve for vr, we can use the equation:

\(vr = (di/dt)R\)

\(vL = -BR/L \times (e^{(-R/L\times t)} - 1)\)

Therefore, in this circuit, when the switch is opened at t=0, the current through the inductor gradually decreases over time, causing a voltage to develop across the inductor and a corresponding drop in the voltage across the resistor.

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Answer: 55 degrees celsius

Explanation:

The measured temperature of the mixture of water was 50°C.

When two physical systems are connected by a heat-permeable path, they are in thermal equilibrium if there is no net flow of thermal energy between them.

The zeroth law of thermodynamics governs thermal equilibrium. A system is said to be in thermal equilibrium with itself if the temperature within it is uniform and constant over time.

Initial temperature of 100 mL of water is 20°C

and Initial temperature of 100 mL of water is 80°C

Let at thermal equilibrium, temperature of the mixture is t° C.

Hence, at thermal equilibrium,

100 mL × ρ × ( t - 20°C) × s = 100 mL × ρ × ( 80°C -t) × s

t - 20° C = 80°C -t

2t = 100°C

t = 50°C

Hence, the measured temperature of the mixture of water was 50°C.

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Answer:0.098

Explanation:

When you stand in front of a mirror and reach out with your right hand to shake hands, the image will remain the same size and the hand that the image will extend is the left hand.

A plane mirror is a type of mirror that is not curved and that has a flat reflective surface.

The characteristics of a plane mirror include the following:

When you stand in front of a mirror and reach out with your right hand to shake hands, the image will remain the same size because image size of a plane mirror is the same size with the object.

Also, the hand that the image will extend is the left hand because the image is laterally inverted.

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The acceleration of the 70 kg astronaut will be 0.34 m/s².Force is defined as the product of mass and acceleration. Its unit is Newton.

Force is defined as the push or pulls applied to the body. Sometimes it is used to change the shape, size, and direction of the body.

Given data;

Mass of astronauts 1,m₁ = 60 kg

Mass of  astronauts 2 ,m₂ = 70 kg

Acceleration of astronauts 1,a₁ = 0.40 m/s²

Acceleration of astronauts 2,a₂ = ? m/s²

The force is found as;

F=ma

The force exerted by one another will be the same;

F₁=F₂

m₁a₁=m₂a₂

Substitute the given value;

60 × 0.40 = 70 × a₂

a₂  = 0.34 m/s²

Hence, the acceleration of the 70 kg astronaut will be 0.34 m/s²

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The time taken for temperature to fall from  45°C to 35°C is 6.21 minutes when a liquid cools from 65°C to 55°C in 5 mins.

We can utilize Newton's Law of Cooling to tackle this issue. It expresses that the pace of progress of temperature of an article is corresponding to the distinction in temperature between the item and its environmental elements.

Utilizing this regulation, we can compose:

(dT/dt) = - k(T - Ts)

where dT/dt is the pace of progress of temperature, k is the cooling steady, T is the temperature of the fluid, and Ts is the temperature of the environmental elements.

To begin with, how about we track down the cooling steady. From the given data, we know that the fluid cools from 65°C to 55°C in 5 mins. Subsequently, we can compose:

-10 = - k(65 - 35)

k = 0.5

Presently, we can utilize this worth of k to make the opportunity taken for temperature to decrease from 45°C to 35°C. We want to tackle:

(dT/dt) = - 0.5(T - 35)

with introductory condition T(0) = 45.

Isolating factors and coordinating the two sides, we get:

ln|T - 35| = - 0.5t + C

Utilizing the underlying condition T(0) = 45, we get:

ln|10| = C

C = 2.303

Subbing this worth of C, we get:

ln|T - 35| = - 0.5t + 2.303

Taking dramatic on the two sides, we get:

|T - 35| = e^(- 0.5t+2.303)

Settling for T = 35°C, we get:

t = 6.21 minutes.

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The complete question is:

A liquid cools from 65°C to 55°C in 5 mins. If the surrounding temperature is 35℃, calculate the time taken for temperature to fall from 45°C to 35°C.

The area enclosed by a hysteresis loop is the measure of D) energy loss per cycle.

Explanation: A hysteresis loop represents the behavior of a magnetic material when subjected to a changing magnetic field. It shows the relationship between the magnetic field strength (H) and the magnetic flux density (B). The loop is closed, meaning that as the magnetic field is cycled back and forth, the material retains some residual magnetism.

The area enclosed by the hysteresis loop represents the energy dissipated or lost as heat during one complete cycle of magnetization and demagnetization. This energy loss is primarily due to the internal friction and resistance of the material. The larger the area of the hysteresis loop, the greater the energy loss.

Therefore, the area enclosed by the hysteresis loop serves as a measure of the energy loss per cycle in a magnetic material. It is an important parameter in assessing the efficiency and performance of magnetic devices.

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Answer:

velocity=2m/s

I hope it's helps you

Answer:

Its average speed, pretending that it traveled at a constant speed, is

v = s / t

= 600 m

5 x 60 s

= 2 m/s

Hope it help...

Havea great day

Answer:

like 23 or something

Explanation:

Answer:

High current flow

Explanation:

Generally , the measuring instruments used by technician also have some resistance, though its value is very low  . So when high current is present in the circuit , that current also passes through the instrument which creates a good potential drop across the instrument . So the external voltage used in the circuit measures less voltage .

The magnitude of the force on the wire is 1.9 × 10⁻⁴ N. The direction of the current is 50° south of the west. 1.9×10 N⁻⁴, out of the Earth's surface is the correct option.

Length of the horizontal wire, L = 3.0 m

Current flowing through the wire, I = 6.0 A

Earth's magnetic field, B = 0.14 × 10⁻⁴ T

Angle made by the current direction with due west = 50° south of westForce on a current-carrying wire due to the Earth's magnetic field is given by the formula:

F = BILsinθ, where

L is the length of the wire, I is the current flowing through it, B is the magnetic field strength at that location and θ is the angle between the current direction and the magnetic field direction

Magnitude of the force on the wire is

F = BILsinθF = (0.14 × 10⁻⁴ T) × (6.0 A) × (3.0 m) × sin 50°F = 1.9 × 10⁻⁴ N

Earth's magnetic field is due north, the direction of the force on the wire is out of the Earth's surface. Therefore, the correct option is 1.9×10 N⁻⁴, out of the Earth's surface.

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The net force on the string is equal to the net force on the rope.

In this problem, we have two blocks connected by a light and inextensible string. We are asked to compare the net force on the string to the net force on the rope in section I, and to compare the horizontal components of the forces exerted by the blocks on the string and the rope.

We determine that the net force on the string is equal to the net force on the rope, and that the horizontal components of the forces exerted by the blocks on the string and the rope are also equal. We then justify the use of assuming a single value for the tension in the string, as the forces exerted by the string on the blocks are equal and opposite.

Finally, we conclude that the magnitude of the net force on the connecting string remains the same even if the mass of the string changes, as long as the motion of the blocks remains the same.

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Some examples of significant figures that can help you better understand them are:

Furthermore, some extra tips are:

This refers to the digits that carry meaning contributing to its measurement resolution and each of the digits of a number that are used to express it to the required degree of accuracy, starting from the first non-zero digit.

Hence, we can see that:

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The correct option is A. (30+ 3 h) m/sec. The average velocity is a physical quantity used to describe the speed and direction of motion of an object.

The average velocity formula is given as follows:

AVERAGE VELOCITY = (final velocity - initial velocity) / time interval

Where Vf represents the final velocity,

Vi is the initial velocity,

Δt is the time interval.

Determine the average velocity of a particle from a certain point The average velocity of a particle from a certain point can be calculated using the formula given above. We need to calculate the difference between the final and initial velocities and then divide it by the time interval to determine the average velocity. We will do the same for each option given. A. (30+3h)m/sec, the difference between the final and initial velocities is 3h. Therefore, the average velocity is given as: AVERAGE VELOCITY = 3h / time interval B. (29+3h)m/sec The difference between the final and initial velocities is 3h.

Therefore, the average velocity is given as: AVERAGE VELOCITY = 3h / time interval C. 29m/sec The difference between the final and initial velocities is 0. Therefore, the average velocity is given as:

AVERAGE VELOCITY = 0 / time interval = 0D. (31+3h)m/sec

The difference between the final and initial velocities is 3h. Therefore, the average velocity is given as:

AVERAGE VELOCITY = 3h / time interval E. (29+h)m/sec The difference between the final and initial velocities is h. Therefore, the average velocity is given as:

AVERAGE VELOCITY = h / time interval As we can see, option A has an average velocity of 3h/time interval, which is different from the other options. Hence, the correct option is A. (30+3h)m/sec.

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A substance's density is a measurement of how heavy it is in relation to its size. If immersed in water, an object will float if its density is lower than that of the water, whereas it will sink if its density is higher.

What is a substance's density?

A substance's density is defined as its mass every unit volume (more specifically, the cubic mass density; sometimes known as specific mass). Although the Roman letter D may also be used, the sign most frequently used for dense is (the misspelling Greek letter rho). The formula for density is mass divided by quantity

Why is a substance's density a valuable property?

Because increasing a substance's mass results in an increase in mass rather than density, density is an intense attribute. A homogeneous object has a density that is equal to its whole mass multiplied by its entire volume at all places.

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Answer:

It is already balanced

Explanation:

It is already balanced

To determine the time it took for the radioactive material to decay to 4/3 of its original amount, we can use the concept of the half-life.

Given that the material decayed to half of its original amount in 5 years, we know that the decay constant (k) can be calculated using the formula:

k = ln(2) / t_1/2,

where t_1/2 represents the half-life.

Substituting the given half-life value, we have:

k = ln(2) / 5.

Next, we can use the exponential decay equation:

N(t) = N_0 * e^(-kt),

where N(t) represents the amount of material at time t, N_0 is the initial amount, and k is the decay constant.

We want to find the time (t) when N(t) is equal to 4/3 of the original amount, so we set up the following equation:

4/3 * N_0 = N_0 * e^(-kt).

Simplifying, we get:

e^(-kt) = 4/3.

Taking the natural logarithm (ln) of both sides, we have:

-ln(4/3) = -kt.

Finally, solving for t, we divide both sides by -k and evaluate the expression:

t ≈ ln(4/3) / k.

Substituting the value of k, we find:

t ≈ ln(4/3) / (ln(2) / 5) ≈ 2.885 years.

Therefore, it took approximately 2.885 years for the radioactive material to decay to 4/3 of its original amount.

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Rotational kinetic energy is the energy an object possesses due to its rotation around an axis. It is half of the product of an object's moment of inertia and angular velocity squared.

What is kinetic energy?

Kinetic energy is the energy required by an object as a result of its motion. It is equal to one half of an object's mass multiplied by its velocity squared.

Mathematically, it can be represented as E_k = 0.5 * m * v^2, where m is the mass of the object and v is its velocity. Kinetic energy is a scalar quantity and has the units of joules (J) in the SI system of units.

What is moment of inertia?

The moment of inertia of an object is a measure of its resistance to changes in rotation rate. It is a property of a rigid body that describes how its mass is distributed relative to a given axis of rotation. The greater an object's moment of inertia, the harder it is to change its rotational motion.

Mathematically, moment of inertia is defined as I = ∑mr^2, where m is the mass of each particle in the object and r is the distance from each particle to the axis of rotation.

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The speed of jogger, while the speed of sound is 343m/s would be 4.8m/s.

The Doppler effect is a phenomenon that occurs when two objects move closer or farther apart, increasing (or decreasing) the frequency of sound, light, or other waves. A source's waves are compressed as they move in the direction of the observer. In contrast, waves from a source that is moving away from the observer become longer. The Doppler Effect (Doppler Shift) was initially postulated by Christian Johann Doppler in 1842.

In order to solve this issue, we must use the Doppler's effect concept and equation. If there is any relative motion between the source and the observer, we know that the frequency heard by the observer is different from the original one according to the Doppler effect.

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Yes, PNS system causes more frequent depolarizations to the SA (Sinoatrial) node.

The PNS (Parasympathetic Nervous System) is responsible for decreasing the heart rate. It does so by releasing acetylcholine, which stimulates the M2 muscarinic receptors found in the SA node. When acetylcholine binds to M2 receptors, it opens potassium channels, leading to hyperpolarization of the SA node cells.As a result, the pacemaker potential threshold increases and requires more time to reach the threshold for depolarization, thus reducing the heart rate. Therefore, by decreasing the potassium ion permeability of the ECF, it slows the heart rate, resulting in fewer depolarizations in the SA node, causing a lower heart rate.

In summary, the parasympathetic nervous system (PNS) causes more frequent depolarizations to the SA node. The PNS slows down the heart rate, but this does not mean that the pacemaker potential is reduced. Instead, the pacemaker potential is hyperpolarized, increasing the threshold for depolarization. Thus, fewer action potentials reach the threshold, and heart rate is decreased. So, the decrease in potassium permeability in the ECF and an increase in the parasympathetic nervous system causes hyperpolarization of the SA node and increases the threshold for depolarization. This, in turn, leads to fewer depolarizations in the SA node, causing a slower heart rate.

Therefore, it can be concluded that the PNS system causes more frequent depolarizations to the SA node and decreases heart rate by increasing the threshold for depolarization, which is accomplished by hyperpolarizing the pacemaker potential.

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The average power developed by the boy during the climb is approximately 29.4 W.

In physics, the amount of energy transferred or converted per unit time is called power.

total height = number of steps x height of each step

total height = 30 x 0.15 m = 4.5 m

Given, time = 60 s

As power = work done / time

work done = force x distance

force = mass x gravity

mass is boy's mass (40 kg) and gravity is acceleration due to gravity (9.81 m/s²).

force = 40 kg x 9.81 m/s² = 392.4 N

The distance that the boy moves is equal to the total height that he has climbed: distance = total height = 4.5 m

work done = force x distance

work done = 392.4 N x 4.5 m = 1765.8 J

power = work done / time

power = 1765.8 J / 60 s

power ≈ 29.4 W

Therefore, the average power developed by the boy during the climb is approximately 29.4 W.

As for the anomalous behavior of water, water has a higher boiling point and melting point as compared to other substances with similar molecular weight. This is due to the strong hydrogen bonding between water molecules, which requires more energy to break the bonds and change the state of water from solid to liquid to gas.

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