Electricity & Magnetism
4
Electricity can be used to produce powerful forces.
What type of energy is electricity converted to in an electromagnet?
A. sound energy
B.
heat energy
C. light energy
D. magnetic energy

If the impulse is strong enough and lasts for a sufficient amount of time, the go-kart will eventually come to a stop.

Option A is correct.

impulse is described as the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector quantity.

If the force is insufficient to stop the go-kart entirely, it will slow down but continue to move. The force and duration of the impulse, along with the mass and speed of the go-kart, will all affect how much deceleration occurs.

Given that momentum plus impulse equals zero, the go-kart's change in momentum as a result of the impulse will be equal in amount but will move in the opposite direction of its original momentum.

As a result, the go-kart's final momentum will be zero, suggesting that it has either stopped or is travelling very slowly.

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Answer:

Both.

Explanation:

Given that a block and a ball have the same mass and move with the same initial velocity across a floor and then encounter identical ramps. The block slides without friction and the ball rolls without slipping. 1)Which one makes it furthest up the ramp ?

Since both of them have the same mass and the same initial velocity, then, they will both have the same kinetic energy.

That is,

K.E = 1/2mv^2

Friction is a force that opposes motion. And since the frictional force is zero,

Both of them will accelerate from Newton's law.

F = ma

We can therefore conclude that both of them will make it further up the ramp.

Answer:

the piano.

Explanation:

Answer:

920000

Explanation:

Each kg contains 1,000 grams

Answer:

68 N

Explanation:

We have a force of 80 N going to one direction and 12 N to the other direction. we subtract 12 from 80 and get 68 N which is the total net force

The net force acting on the wagon is equal to 68 N.

The net force acting on an object can be defined as the vector sum of all forces acting. The net force is a single force that can give same the effect as the original forces on the object's motion.

The net force will be the resultant force with a similar effect on the rotational motion as all actual forces taken together by the object.

In the question, the applied force will act in the opposite direction of the frictional force so we need to subtract these two forces to find the net force.

Given, the applied force to push the wagon = 80 N

The frictional force between wagon and ground = 12 N

The net force on the wagon = 80N + (-12N) = 68 N

Therefore, the net force equal to 68 N will act in the direction of the applied force.

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Answer:4 m/s

Explanation:

Answer:

P V = N R T     ideal gas equation

P2 / P1 = T2 / T1       where the other variables are constant

P2 = (T2 / T1) * P1 = (313 / 293) * 40 psi = 42.7 psi

B) A pendulum is a mass suspended on the bottom of a string.

A pendulum is a simple mechanical device that consists of a mass (known as the bob) suspended from a fixed point by a string, wire, or rod. When the bob is pulled to one side and released, it swings back and forth under the influence of gravity, forming a regular pattern of motion. The time it takes for the pendulum to complete one full swing (i.e., from one extreme position to the other and back again) is known as its period. The period of a pendulum is affected by the length of the string and the strength of gravity. The longer the string, the longer the period, and the stronger the gravity, the shorter the period.Pendulums have a wide range of practical applications, such as timekeeping, as seen in grandfather clocks. They are also used in scientific experiments to measure time intervals and gravitational acceleration.

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Here, we are required to determine which element has atoms with Valence electrons in a higher energy level than those of calcium.

The Valence electrons of the Caesium, Cs atoms has higher energy level than those of Calcium.

First, we need to determine the electronic configuration of each of the elements

Among the elements in the option, the Valence electrons of the Caesium, Cs atoms has higher energy level than those of Calcium.

This is so because the only Valence electron of Cs is located in the 6s orbital and as such has the highest energy level amongst all of the elements.

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Answer:

(Question 1) 5

(Question 2) They have valence electrons in the same energy level

(Question 3) Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons

(Question 4) cesium (Cs)

(Question 5) There are two electrons in the first energy level and seven electrons in the second energy level

Explanation:

just finished the quick check, enjoy UwU

Answer:

Your accleration would be 3.2 seconds because it takes you that long to reach 35 miles per hour.

Explanation:

I really hopes this helps.

The answer should be 28 pocketbooks

No. of pocketbooks read this month = 41

No. of pocketbooks read last = 13 fewer than this month

Total no. of pocketbooks read last month = 41-13= *28*

Therefore, Liza read 28 books last month

Thank You

Here,

object distance(u)= -3cm;

image distance (v)= 5 cm

focal length(f) = ?

Now using lens formula for Diverging ( concave) lens

Answer:

 v = 29.4 m / s

Explanation:

For this exercise we can use the conservation of mechanical energy

Lowest starting point.

          Em₀ = K = ½ m v²

final point. Higher

          \(Em_{f}\) = U = m g h

Let's use trigonometry to lock her up

          cos 60 = y / L

          y = L cos 60

Height is the initial length minus the length at the maximum angle

           h = L - L cos 60

           h = L (1- cos 60)

energy is conserved

         Em₀ = Em_{f}

          ½ m v² = mgL (1 - cos 60)

         v = 2g L (1- cos 60)

let's calculate

          v² = 2 9.8 3.0 (1- cos 60)

          v = 29.4 m / s

Answer:

0

Explanation:

it takes 84 years for Uranus to orbit the Sun. It only takes 12 years for Jupiter to orbit the Sun. So technically by the time that Jupiter finishes it's one, Uranus will not be able to even finish half of its orbit.

The cost of operation for an A.C for 10 hours per day for a month will be 71,100 francs.

Power is the amount of energy transferred or converted per unit time. The unit of power is the watt, equal to one joule per second. Power is a scalar quantity.

Cost of operation for 10 hours a day;

Daily consumption = 3kW x 10 hours

Daily Consumption = 30kW

Since 1kWH = 79 francs;

Daily consumption amount = 30 x 79 francs

Daily consumption amount = 2,370 francs

Therefore, the monthly consumption (using 30days) will be;

2,370 francs x 30 = 71,100 francs

In conclusion, 71,100 francs will be spent in a month (30 days) to run the 3kW rated A.C for 10 hours a day at 1kWH.

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The intensity of a sound wave with a relative intensity of 13.7 dB is  5.01×10¹³w/m²(option -b).

The "decibel level" of a sound is a less formal term for the relative intensity level. Relative intensity level differs from intensity in that it employs a logarithmic scale to more closely resemble how people perceive loudness.

Given,

The relative intensity of the sound wave= 13.7dB.

To calculate the intensity of the sound wave, we will use the formula provided by.

B = log₁₀I/I₀

When we factor the value of B into the previously mentioned relation and solve for I/I0, we get:

13.7dB = 10×log₁₀I/I₀

solving,

I/I₀ = \(10^{13.7}\)

I/I₀ = 5.01×10¹³w/m².

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Answer:

E = h f - h f0    

E is the energy of the emitted photon - h f is the energy in an incident photon of frequency f

h f0 is the energy required to remove an electron from the metal being considered

If h f is not equal to or greater than h f0 then no photons will be emitted.

Answer:

yes I think

Explanation:

Solar energy systems refer to any technology that converts the sun's energy into another form of energy, such as heat or electricity. ... Solar power is a a subset of solar energy, a more narrow term that typically refers to the conversion of the sun's rays to electricity.

The density of mercury can be calculated using the formula:

Density = (mass of mercury) / (volume of mercury)

To calculate the volume of the mercury, we need to subtract the volume of the bottle from the volume of the bottle filled with mercury.

Volume of bottle = Volume of bottle filled with mercury - Volume of mercury

Let's assume that the volume of the bottle filled with mercury is V1 and the volume of the bottle is V2. We can then write:

Density of mercury = (mass of mercury) / (V1 - V2)

Given that the mass of the empty bottle is 20g, we can calculate the mass of the mercury as follows:

Mass of mercury = (mass of bottle filled with mercury) - (mass of empty bottle)

= 360g - 20g

= 340g

The mass of the bottle filled with water is 45g. Therefore, the mass of the mercury in the bottle is:

Mass of mercury = 360g - 45g = 315g

Let's assume that the density of the bottle is negligible. We can then calculate the volume of the mercury as follows:

Volume of mercury = (mass of mercury) / (density of mercury)

Substituting the values we have:

315g / (density of mercury) = (V1 - V2)

We know that the mass of the water in the bottle is 45g, which means that the mass of the mercury is (360g - 45g) = 315g. Therefore, the volume of the mercury is equal to the volume of the water. We can then write:

Volume of mercury = Volume of water = (mass of water) / (density of water)

The density of water is 1 g/cm³. Substituting the values we have:

315g / (density of mercury) = 45g / 1 g/cm³

Solving for the density of mercury, we get:

Density of mercury = (315g * 1 g/cm³) / 45g

= 7 g/cm³

Therefore, the density of mercury is 7 g/cm³.

The order in which the readings will be taken is as follows:

1. Mass of empty bottle

2. Mass of bottle filled with mercury

3. Mass of bottle filled with water (or the mass of the bottle filled with mercury and the mass of the empty bottle, from which we can calculate the mass of the mercury)

4. Volume

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Answer:

A

Explanation:

One of the main benefits of informational interviewing is that it allows the person conducting the interviews to gain insights and information about a particular career or industry.

the right answer for this question would be dispositional

Answer:

dispositional

Explanation:

Once the average value of T and its standard deviation are determined, the spring constant k can be calculated using the equation k = 4π^2m/T^2, where m is the mass of the block.

To find the average value of T, the ten measurements of T are added together and divided by ten. The standard deviation of T is calculated using the formula that involves finding the square root of the variance.

This experiment aims to demonstrate the relationship between the period of oscillation and the spring constant of the spring. By measuring the period of oscillation of the spring with a known mass hanging from it, the spring constant can be determined, which is a fundamental property of the spring.

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Take into account that if the system is in equilibrium, then, the sum of torques must be equal to zero. In this case, both weight of the block and applied force F generate a torque over the central fixed point with different signs:

W is the weight of the block, L1 the distance fromthe block to the pivot, F the applied force and L2 the distance between the point of the application of the force and the pivot.

The previous equation can be written as follow:

The previous relation determines the equilibrium of the system.

Then, you can conclude:

(i) If F is increased, then, the board will rotate clockwise, because the torque produced by F will be greatest than the torque produced by the weight.

(ii) If is decreased, then, the board will rotate counter-clockwise, because the torque priduced by the weight will be greater.

(iii) If the applied force approaches to zero, then, the board will rotate counter-clockwise again, because there will be no torque at the right of the pivot.

(a) Now, if the weight is moved closer to the pivot (pin), the torque at the left appraches to zero, and then the board will rotate clockwise.

(b) If the applied force is moved to a position closer to the pivot, the torque at the right approaches to zero, and then, the board will rotate counter-clockwise.

(c) If the weight of the block decreases to 50N, it means that the torque at the left will decrease to ione half of its initial value. Under this new condition the equilibrium of the system breaks down and the board will rotate clockwise.

Answer: 1 How many grams of KCl will dissolve in 1 liter of H2O at 50 °C? 5. 58.0 g of K2Cr2O7 is added to 100 g H2O at. 0 °C. With constant stirring, to what temp-.                                                                                                                                     2  34 °C? 4. How many grams of KCl will dissolve in 1 liter of H2O at 50 °C? 5. 58.0 g of ... A saturated solution of KClO3 was made with 300 g of H2O at. 34 °C.

Explanation:

Option C. The heat absorbed or lost by a substance while it's changing state  correctly describes latent heat

Latent heat is the heat absorbed or lost by a substance while it is changing state.

The latent heat is a type of heat that is transferred during phase change, i.e., while a substance undergoes a change of state.

For example, when ice melts into liquid water, or when liquid water evaporates into water vapor, heat is absorbed from the surroundings.

Latent heat is not associated with a temperature change; rather, it's associated with a change of state.

For instance, the temperature of water remains at 100°C while boiling.

When water is boiling, the latent heat of vaporization is absorbed and utilized to break the hydrogen bonds holding water molecules together to change water from the liquid phase to the gaseous phase.

When the water is boiling, adding more heat won't increase the water's temperature, instead, the extra heat will be absorbed to change the phase of water molecules.

Therefore, the correct answer to the given question is option C: The heat absorbed or lost by a substance while it is changing state.

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Considering the definition of precision and accuracy, the mass readings of the digital balance are accurate but not precise.

Precision as the proximity between the indications or measured values ​​of the same measurand, obtained in repeated measurements, under specified conditions.

Accuracy is defined as the closeness between the measured value and the "true" value of the measurand.

In other words, accuracy is how close a measurement is to the true value, while precision is how close the values ​​of several measurements are to a point.

Precision and accuracy are independent of each other. Thus, the results in the values ​​of a measurement can be precise and not exact (and vice versa).

A set of 500-g masses is placed one at a time on a digital balance during quality control testing. The mass readings are 397 g, 401 g, and 403 g.

In this case, the measurement is accurate, since the results of each individual measurement are quite similar. But the measurements are not exact (not precise) because the results are far from the real value.

In summary, the mass readings of the digital balance are accurate but not precise.

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