Calculate the
charge of 100 electrons (in coulombs)

Answer:

B) –1.1 × 1011 N

Explanation:

Since the second charge is 2 m away and is labeled q₂ = - 4 Coulombs. The third charge is 1 m away and is labeled q₃ = + 3 Coulombs, the electrical force between q₂ and q₃ is -1.1 × 10¹¹ N

To answer the question, we need to find the electrical force of attraction between two charges and this is given by Coulomb's law

This states that the electrical force of attraction between two charges, F is directly proportional to the product of the charges q and Q and inversely proportional to the square of their distance apart, d.

So, mathematically F = kqQ/d²

Now, given that there are three charges are on a line. A positive charge is on the far left labeled q₁ = + 6 Coulombs. The second charge is 2 m away and is labeled q₂ = - 4 Coulombs. The third charge is 1 m away and is labeled q₃ = + 3 Coulombs.

So, the electrical force of attraction between q₂ and q₃ is F = kq₂q₃/d² where

Substituting the values of the variables into the equation, we have

F = kq₂q₃/d²

F = 8.99 × 10⁹ Nm²/C² × (-4 C) × (+ 3 C)/(1 m)²

F = 8.99 × 10⁹ Nm²/C² × (-12 C²)/(1 m)²

F = -107.88 × 10⁹ Nm²/1 m²

F = -1.0788 × 10¹¹ N

F ≅ -1.1 × 10¹¹ N

Since the second charge is 2 m away and is labeled q₂ = - 4 Coulombs. The third charge is 1 m away and is labeled q₃ = + 3 Coulombs, the electrical force between q₂ and q₃ is -1.1 × 10¹¹ N

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Answer: >41.5N

Explanation:

Mass of bowling ball = 7.5kg

Breaking point of rope = T > 115N

Where T = Tension on the rope

Since the bowling ball is hung by a rope :

Tension (T) = mg = 7.5 kg × 9.8m/s^2 = 73.5kgm/s^2

T = mg + ma

F = ma

T = mg + F

>115 = 73.5 + F

F = 115 - 73.5

F = 41.5N

Force >41.5N

Answer:

a. Pure white

b. Pure black

c. Hybrid

Momentum = (mass) x (velocity)

On the way to the plate, the momentum of the ball was

(0.15 kg) x (40 m/s this way <==) = 6 kg-m/s this way <==

After the hit, the momentum of the ball was

(0.15 kg) x (45 m/s that way ==>) = 6.75 kg-m/s that way ==>

The CHANGE in momentum was 12.75 kg-m/s that way ==>

That's the momentum that the bat gave it.

Change in momentum = Impulse

Impulse = (force) x (length of time the force lasts)

12.75 kg-m/s = (force) x (0.002 second)

Force = (12.75 kg-m/s) / (0.002 second)

Force = 6,375 Newtons, that way ==>

Answer:

The electric force decrease as the distance increase and vice versa

As it obeys inverse square law that states ththaforce is inversly proportional to square if distance

so if the distance increased to twice the force will be decreased to quarter.

And that is coloumb's law of electrostatic force:

Coulomb's law states that the electrical force between two charged objects is directly proportional to the product of the quantity of charge on the objects and inversely proportional to the square of the separation distance between the two objects.

F=k(Q1.Q2)/r2

So as you increase the distance between charged objects, Force(attraction/repulsion) weakens by the square of their distance.

As you decrease the distance between charged objects, Force strengthens by the square of their distance.

Inverse relationships are common in nature. In electrostatics, the electrical force between two charged objects is inversely related to the distance of separation between the two objects. Increasing the separation distance between objects decreases the force of attraction or repulsion between the objects. And decreasing the separation distance between objects increases the force of attraction or repulsion between the objects. Electrical forces are extremely sensitive to distance. These observations are commonly made during demonstrations and lab experiments. Consider a charged plastic golf tube being brought near a collection of paper bits at rest upon a table. The electrical interaction is so small at large distances that the golf tube does not seem to exert an influence upon the paper bits. Yet if the tube is brought closer, an attractive interaction is observed and the strength is so significant that the paper bits are lifted off the table. In a similar manner, charged balloons are observed to exert their greatest influence upon other charged objects when the separation distance is reduced. Electrostatic force and distance are inversely related.

The pattern between electrostatic force and distance can be further characterized as an inverse square relationship. Careful observations show that the electrostatic force between two point charges varies inversely with the square of the distance of separation between the two charges. That is, the factor by which the electrostatic force is changed is the inverse of the square of the factor by which the separation distance is changed. So if the separation distance is doubled (increased by a factor of 2), then the electrostatic force is decreased by a factor of four (2 raised to the second power). And if the separation distance is tripled (increased by a factor of 3), then the electrostatic force is decreased by a factor of nine (3 raised to the second power). This square effect makes distance of double importance in its impact upon electrostatic

Answer:

Charge

Explanation:

Answer:

\(D.490.5\ m\)

Explanation:

\(We\ are\ given\ that,\\Acceleration\ due\ to\ gravity\ (On\ Earth)=9.81\ m/s^2\\Initial\ Velocity\ of\ the\ body=0\ m/s\\Time\ taken=10\ seconds\\Hence,\\From\ the\ Second\ Equation\ of\ Motion:\\S=ut+\frac{1}{2}at^2\\By\ reconstructing\ the\ equation:\\S=ut+ \frac{1}{2}gt^2\\Hence, here\\S=0*10+\frac{1}{2}*9.81*10^2\\S=\frac{1}{2}*981\\S=490.5\ m\)

Given :

A rectangular solid box of aluminum is heated.

To Find :

Which of the following is not true.

A) Its mass remains constant

C) its density increase

B) Its volume increase

D) none of the above​

Solution :

We know, when an object is heated it expands.

Objects expands means that the volume increases but mass remains same by conservation of mass.

Since mass remains constant and volume increases.

So, density will decrease.

Hence, this is the required solution.

Answer:

gas vibrates and moves freely at high speeds.

Explanation:

Hope this helps

Answer:

D

Explanation:

Magnetic domains are always present in ferromagnetic materials due to the way the atoms bond to form the material. However, when a ferromagnetic material is in the unmagnetized condition, the magnetic domains are randomly oriented so that the magnetic field strength in the piece of material is zero.

Answer:

D. magnetic fields of atoms being aligned with each other

Explanation:

The maximum height travelled by the ball before returning to the ground is 8.62 m.

The maximum height travelled by the ball before returning to the ground is calculated by applying the following kinematic equation as shown below.

H = (u²sin²θ) / 2g

where;

H = (26² (sin 30)²) / (2 x 9.8)

H = 8.62 m

Thus, the maximum height travelled by a projectile depends on the initial velocity and angle of projection.

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The first situation that the bird is giving force to its wings to fly , it is related to the first law. The second one the coffee cup stay on rest until any force acts on it is related to the first law.

Newton's first law of motion states, every objects tends to stay in its current  state until an external force acts on it. The second law states that, the force is the product of mass and acceleration. Thus, greater is the mass greater force is needed to accelerate an object.

Third law of motion states that, for every action there is an equal and opposite reaction.

The sailor when pushing the boat, the boat is exerting a force in turn and the man can slide to the land and boat moves away. This is third law of motion.

As the force by the wind increases, its acceleration increases . This is second law. The team with greater mass in tug of war game will  have greater force that is just the second law.

The skater board tends to move again even after the hitting, its is first law of Newton.

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Refrigerant oil boiling pressure The boiling pressure of refrigerant oil is determined by the temperature of the system. This temperature varies depending on the pressure exerted on the oil. The refrigerant oil will boil at a different temperature for each refrigerant.

The boiling point of refrigerant oil can be estimated by determining the boiling pressure at a certain temperature of the system. The approximate boiling pressure of refrigerant oil in a system ranges from 20 to 30 psig. However, this value may vary depending on the type of refrigerant used in the system. The refrigerant oil can also be changed depending on the type of refrigerant used in the system.The type of refrigerant used in the system will also affect the boiling pressure of refrigerant oil. A refrigerant is a substance that changes from a liquid state to a gaseous state at a specific temperature. It is used in refrigeration systems to transfer heat from one location to another. The refrigerant oil is added to the system to ensure that all parts of the system are lubricated. This prevents the parts from grinding together and causing damage.

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Answer:

its the lorry

Explanation:

The kinetic energy of the truck will be, 5625000 kg m/s and the kinetic energy of the bullet will be 156250 kg m/s. So the kinetic energy of the lorry will be higher than the kinetic energy of the Bullet.

Kinetic energy is a type of energy that a particle or an object possesses as a result of its motion. By exerting a net force on an item, work is done, which transfers energy; as a result, the object accelerates and obtains kinetic energy.

A moving item or particle's ability to move depends on both its mass and velocity. This is known as kinetic energy. Translation (or movement along a path from one location to another), rotation about an axis, vibration, or any combination of motions are examples of possible types of motion.

According to the question,

K.E of the lorry: 1/2 (4500)(50)²

K.E of the lorry = 5625000 kg m/s.

K.E of the bullet: 1/2(0.05)(250)²

K.E of the bullet = 156250 kg m/s

Hence, the kinetic energy of the lorry is greater than the kinetic energy of the bullet.

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By using the emission spectra the following were found:

A) The element which has an emission spectra with these wavelengths is Strontium (Sr).

B) The element A above has a strong emission around 670 nm which would correspond to a red line.

C) The strong emission line around 570 nm corresponds to the frequency of 5.26 x 10^14 Hz.

A) The unknown sample contains an element whose emission spectra showed a strong emission at 610 nm and 480 nm but not at 670 nm. The element which has an emission spectra with these wavelengths is Strontium (Sr). The emission spectra of Sr has strong emission lines at 460 nm, 485 nm, and 610 nm. So, the high school student's unknown sample contains Strontium (Sr).

B) The element A above has a strong emission around 670 nm which would correspond to a red line. This is because the red color has the longest wavelength among all the colors of the visible spectrum. The wavelength of the red color is around 700 nanometers, and the wavelength of violet color is around 400 nanometers. As the wavelength of the red color is the longest, it is visible as a red line in the emission spectra.

C) As per the diagram given above, Element C has a strong emission line around 570 nm. We know that the speed of light is 3.0 x 10^8 m/s and frequency of light is given by the equation,

frequency = speed of light/wavelength

In order to find the frequency which corresponds to the wavelength of 570 nm, we need to convert the wavelength in meters.

1 nm = 1 x 10^-9 m

So, 570 nm = 570 x 1 x 10^-9 m = 5.7 x 10^-7 m

frequency = (3.0 x 10^8 m/s)/(5.7 x 10^-7 m) = 5.26 x 10^14 Hz

The strong emission line around 570 nm corresponds to the frequency of 5.26 x 10^14 Hz.

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Answer: The head temperature rises as the vapors of lower-boiling compound fill the distillation head. The temperature drops because the lower-boiling compound finishes distilling before vapors of the higher-boiling compound can fill the distillation head, which then cause the head temperature to rise.

Answer:

c.glass sheet

Explanation:

glass sheet is the plain surface and it will have low friction. compare to cloth,sand have uneven surface

Answer: a

Explanation:becouse it has the right variable

Answer:

the fact that Venus shows phases

Explanation:

Calculate the velocity(v) at the bottom of hill.

As we know ,

\( \bf\: Kinetic \: energy = \dfrac{1}{2} \times m \times {v}^{2} \)

\( \red \bigstar \bf \: putting \: the \: values\)

\( \rightarrow \: 25 = \dfrac{1}{2} \times 2 \times {v}^{2} \)

\( \rightarrow \: 25 \times 2 = 1 \times 2 \times {v}^{2} \)

\( \rightarrow \: 50 = 2 \times {v}^{2} \)

\( \rightarrow \: {v}^{2} = \cancel \dfrac{50}{2} \)

\( \rightarrow \: {v}^{2} = 25\)

\( \rightarrow \: v = \sqrt{25} \)

\( \rightarrow \: v = 5 \: m {s}^{ - 1} \)

A.  Time taken for swing of a pendulum is 2.3 seconds per swing.

B. To find the time for one swing more accurately, the student can increase the number of swings, use a stopwatch with higher precision, minimize external disturbances, and repeat the experiment to calculate the average time.

The time taken for 20 swings of a pendulum is 46 seconds. To find the time for one swing, we need to divide the total time by the number of swings.

a. Time for one swing: 46 seconds / 20 swings = 2.3 seconds per swing.

To find the time for one swing more accurately, the student can employ the following techniques:

1. Increase the number of swings: By measuring the time for a larger number of swings, the student can reduce the impact of measurement errors and obtain a more precise average time. For example, measuring the time for 100 swings and then dividing by 100 would provide a more accurate estimate.

2. Use a stopwatch or timer with higher precision: Using a stopwatch or timer that provides more decimal places or higher precision can help capture smaller time intervals more accurately. This can reduce rounding errors and improve the accuracy of the measurement.

3. Minimize external disturbances: To ensure accurate timing, it is important to minimize external disturbances that may affect the pendulum's motion, such as air drafts or vibrations. Conducting the experiment in a controlled environment can help reduce these disturbances and enhance measurement accuracy.

4. Repeat the experiment: Performing the measurement multiple times and calculating the average time can help account for any inconsistencies or random errors in the measurements. This can lead to a more reliable and accurate estimate of the time for one swing.

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Answer:

Help with what??

Explanation:

Explanation:

there is no question to answer..

When a nucleus emits a gamma ray, it does not change its atomic number or mass number.

Gamma rays are emitted by a nucleus that is in an excited state, and the emission of a gamma ray allows the nucleus to return to its ground state.

The emission of a gamma ray does not change the identity of the nucleus.

Therefore, the resulting nucleus after the emission of a gamma ray is still 22890Th, with 90 protons and 138 neutrons.

None of the other answer choices in the question have the same atomic number and mass number as 22890Th, so the correct answer is (a) 22890Th.

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Answer:

Explanation:

We will use the KE equation you wrote here and fill in what we are given:

\(36=\frac{1}{2}m(12)^2\) and isolating the m:

\(m=\frac{2(36)}{12^2}\) which gives us

m = .50 kg

The question is incomplete, the complete question is;

Water has a specific heat of 4.186 J/g°C, and ethanol has a specific heat of 2.450 J/g°C. Based on this information, which best compares water and ethanol?

It requires more heat to raise the temperature of a gram of ethanol by 1°C.

There are more molecules in a gram of water.

Ethanol has a lower formula mass.

Water has more protons and neutrons in its nuclei.

Answer:

There are more molecules in a gram of water.

Explanation:

Let us recall that the molar mass of water is 18g/mol while the molar mass of ethanol is 46 g/mol.

Hence;

1 g of water contains 18 g

There are 6.02 × 10^23/18g = 3.34 × 10^22 molecules in 1 g of water

1 g of ethanol contains 46 g

There are 6.02 × 10^23/46 g = 1.31 ×10^22 molecules

Hence, there are more molecules in 1 g of water than in 1g of ethanol.

Answer:

there are more molecules in 1 g of water than in 1g of ethanol.

Explanation:

edge 23

Answer:

Ohayo, Haruki-kun here!

The answer is,  alcohol thermometer uses alcohol as the liquid to measure the temperature variations. Alcohol expands when it absorbs temperature and contract in colder temperatures. Most commonly used alcohol in these is ethanol, but different types of alcohols can be used depending on the measured temperature and environment in which the measurements are taken.

Explanation:

Answer:

As rainwater falls, it is naturally soft. However, as water makes its way through the ground and into our waterways, it picks up minerals like chalk, lime and mostly calcium and magnesium and becomes hard water. ... Even hair washed in hard water may feel sticky and look dull.

Explanation:

The wavelength of the carrier wave of a campus radio station broadcasting at a frequency of 102.2 MHz is approximately 2.94 meters, calculated using the formula wavelength = speed of light/frequency.

The wavelength of the carrier wave of a radio station can be calculated using the formula:

wavelength = speed of light/frequency

where the speed of light is approximately \(3 x 10^8 m/s\).

Plugging in the frequency of the campus radio station, which is 102.2 MHz or \(102.2 x 10^6 Hz\), we get:

wavelength \(= 3 x 10^8 m/s / 102.2 x 10^6 Hz = 2.93\) meters

Therefore, the wavelength of the carrier wave of the campus radio station is 2.93 meters.

It's important to note that the wavelength of a radio wave is inversely proportional to its frequency. This means that as the frequency of the wave increases, its wavelength decreases, and vice versa.

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According to the given statement 11.38 T is the magnitude of the magnetic field inside the solenoid.

By using the symbol |v|, the strength of a vector theorem can be utilized to determine the length for such a given vector (let's say v). This amount is essentially the distance between the vector's beginning point and ending point. The range calculation, which we will go over in this section, is used to determine the vector's magnitude.

Length of solenoid, L = 2.5 cm = 0.025 m

Radius of solenoid, r = 0.55 cm = 0.0055 m

Number of turns, N = 45 turns

Current, I = 1.15 A

Magnetic field, B, is given as:

B = (N*r*I) /L

B = (45 * 0.0055 * 1.15)/0.025

B = 11.38 T

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The complete question is-

A solenoid of length 2.50 cm and radius 0.550 cm has 45 turns. If the wire of the solenoid has 1.15 amps of current, what is the magnitude of the magnetic field inside the solenoid?

Answer:

wheels

Explanation:

Answer:

Wheels

Explanation:

I know it says check all that apply so you might think it's more than one, but trust me it's right. I took the test :)