What are the 10 examples of force?

The maximum kinetic energy with which the same radiation ejects electrons from another metal with a work function of 2.19 eV is 1.31 eV.

When radiation of a certain wavelength falls on a metal surface, it can eject electrons from the surface if the energy of the radiation is greater than the work function of the metal. The work function is the minimum energy required to remove an electron from the metal surface. The maximum kinetic energy of the ejected electrons depends on the difference between the energy of the radiation and the work function of the metal. If the maximum kinetic energy of the ejected electrons is 0.60 eV for one metal with a work function of 2.90 eV, then the energy of the radiation can be calculated as 3.50 eV. Using this same radiation, the maximum kinetic energy of the ejected electrons for another metal with a work function of 2.19 eV can be calculated as 1.31 eV. This is because the difference between the energy of the radiation and the work function of the second metal is 3.50 eV - 2.19 eV = 1.31 eV.

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The signal that has a continuous change in amplitude and frequency is known as an analog signal. This type of signal is characterized by its ability to represent a range of values using a continuous waveform, as opposed to a digital signal which represents values discretely.

The amplitude of an analog signal refers to the height of the waveform at a given point in time, while the frequency refers to the number of cycles per second. In an analog signal, both the amplitude and frequency can change continuously, resulting in a signal that is constantly varying in both amplitude and frequency.
Examples of analog signals include sound waves, radio waves, and electrical signals. These signals are used in a wide variety of applications, from music and communication to industrial automation and medical imaging.
Overall, the continuous change in amplitude and frequency of analog signals allows for more precise and nuanced representation of data, making them an important tool in many fields.

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ANSWER

Normal force

EXPLANATION

We want to determine what FN would represent on a force diagram.

On a force diagram, FN represents the component of a contact force that acts perpendicular to the surface with which an object makes contact. It is exerted by surfaces and prevents objects from passing through each other.

This force is known as the normal force.

That is the answer.

The block will travel 2.038 m before stopping. Newton's third equation of motion is applied in the given problem.

It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).

it is defined as the product of the coefficient of friction and normal reaction.

On resolving the given force and acceleration. Mathematically in the different components and balancing the equation gets.Components in the x-direction.

From Newton's third equation of motion;

v²=u²+2as

0 =u²+2(-a)s

u²=2as

u²=2×(2×μg)s

4.00 m/sec = √2×(2 ×0.2 ×9.81 s

16 = 7.848 s

s = 2.038 m

Hence, the block will travel 2.038 m before stopping.

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Answer:

Explanation:

The formula for KE is

\(KE=\frac{1}{2}mv^2\) which makes solving our problem for velocity super easy. We will rewrite the formula in terms of v to get:

\(v=\sqrt{\frac{2KE}{m} }\) and filling in:

\(v=\sqrt{\frac{2(50)}{25} }\) so

v = 2 m/s to the correct number of sig fig's

It will cost 0.324 Dollars to light six 100w light bulbs for six hours if the price of electrical energy is $0.09/ kwh.

kwh is commercial unit of electric energy. 1 unit= 1 kwh.

When 100 w power device is run for 1 hour, the amount of electrical energy consumed is 1 kwh.

We will find total units of electrical energy consumed in the given question.

energy consumed by 6 bulbs = 6×100= 600 w( joules per second).

The value in kwh is = 600÷1000

                                = 0.6kwh

Total energy consumed in 6 hours is = 0.6×6 = 3.6 kwh

So, the cost is = 3.6×0.09 = 0.324 dollars.

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Answer:

Explanation:

2. 330.63 ft because v*t=d and 3.09*107=330.63

3. 4.2 because 10/2.4=4.1666

4. 130 miles because 2 hours times 65mph= 130

5. 62.3 seconds because 480000/7700=62.33766233

8. 60 meters, because 0.5 *120 (because 2 minutes converted to seconds is 120) is equal to 60.

Answer:Atomic model keep changing because the electrons around the nucleus are not fixed and they keeps rotating or changing their position in valence orbits around the nucleus.

Explanation:

Positive change in entropy of the system when the flask of hexanes is boiled.

In this case, Option C is correct

What is thermodynamics?

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Charge 3 experiences a force of 1.43 x 10⁻⁵ N from charges 91 and 92.

Using Coulomb's equation, we can calculate the force that charge 3 will encounter due to the existence of charges 91 and 92:

F=K×(q1×q3/r132) + K×(q2×q3/r232).

(A - A)

2 + (B - 0) (B - 0)

sqrt = r23 = b = 2

The result of exchanging the values for charge and distance is:

[√(a2 + b2) / (6.5 x 10-9 C × 19.5 x 10-9 C)] is equal to F. [(-4.5 x 10-9 C) × (19.5 x 10-9 C) / b2] is the formula for F. .

9.0 x 109 N m2/C2 plus 9.0 x 109 N m2/C2.

Doing for F

F = -2.78 x 10⁻⁵ N + 1.35 x 10⁻⁵ N

we will get

F = -1.43 x 10⁻⁵ N

Hence, charge 3 experiences a force of 1.43 x 10⁻⁵ N from charges 91 and 92.

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Answer:

C. The student should make a concave lens model because it directs light away from the center of the lens

Explanation:

The student should make a concave lens model because it directs light away from the center of the lens.

A lens that has at least one inward-curving surface is said to be concave. Since it is a divergent lens, light rays that have been bent by it are dispersed. Short-sightedness is treated by concave lenses, which are thinner in the center than the borders (myopia).

The earliest known usage of a corrective lens is mentioned in Pliny the Elder's writings (23–79). Pliny claims that Emperor Nero used an emerald, perhaps concave formed to adjust for myopia, to watch gladiatorial matches.

After passing through the lens, light beams appear to originate from a spot known as the primary focus.

Therefore, The student should make a concave lens model because it directs light away from the center of the lens.

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The angle of the plate will affect how much sunlight hits the plate. The amount of sunlight that hits a surface depends on the angle of incidence, which is the angle at which the sunlight hits the surface. When the angle of incidence is perpendicular to the surface (i.e., the sun is directly overhead), the maximum amount of sunlight is received by the surface.

However, as the angle of incidence increases, the amount of sunlight that hits the surface decreases because the same amount of sunlight is spread over a larger area. Therefore, if the plate is not angled properly to face the sun, it will receive less sunlight, which will affect its efficiency in converting sunlight into electricity.

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When John reacts to his partner's complaints by cross-complaining, he is manifesting a form of miscommunication known as defensiveness.

Defensiveness is a defensive response that occurs when someone feels attacked or criticized and responds by counter-attacking or shifting the blame onto the other person. Instead of addressing the concerns or complaints raised by his partner, John deflects them by bringing up his own complaints or grievances. This form of communication can escalate conflicts and hinder effective problem-solving and understanding between partners. Complaints are expressions of dissatisfaction or grievances about a particular issue or situation. People may have complaints in various areas of life, such as relationships, work, customer service, or product quality. Complaints are a form of communication used to express discontent or raise concerns in the hopes of seeking resolution or improvement.

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To find the number of turns of wire necessary to obtain a self-inductance of 1.15 H for a toroidal solenoid of square cross-section with inner and outer radii of 3.0 and 4.0 cm, we can use the formula for the self-inductance of a toroidal solenoid:

L = μ₀N²πr² / (2πr + πd)

where L is the self-inductance, N is the number of turns of wire, r is the mean radius (the average of the inner and outer radii), d is the cross-sectional diameter (in this case, equal to the side length of the square cross-section), and μ₀ is the permeability of free space (4π x 10^-7 H/m).

Plugging in the given values, we get:

1.15 = (4π x 10^-7)(N²π(0.035+0.04)²) / (2π(0.04) + π(0.01))

Simplifying, we get:

1.15 = 1.053 x 10^-6 N²

Solving for N, we get:

N = √(1.15 / 1.053 x 10^-6) ≈ 1093 turns

Therefore, approximately 1093 turns of wire are necessary to obtain a self-inductance of 1.15 H for the given toroidal solenoid.
To find the number of turns of wire necessary for a toroidal solenoid with a square cross-section, inner radius of 3.0 cm, outer radius of 4.0 cm, and a self-inductance of 1.15 H, we can use the formula for the self-inductance of a toroidal solenoid:

L = (μ₀ * N² * A * h) / (2 * π * R)

where:
L = self-inductance (1.15 H)
μ₀ = permeability of free space (4π × 10⁻⁷ H/m)
N = number of turns of wire (unknown)
A = cross-sectional area of the solenoid (square cross-section)
h = height of the solenoid (which is the difference between the outer and inner radii, 4.0 cm - 3.0 cm = 1.0 cm)
R = average radius of the solenoid (which is the average of the inner and outer radii, (3.0 cm + 4.0 cm) / 2 = 3.5 cm)

First, convert the measurements from cm to meters:
h = 1.0 cm * 0.01 m/cm = 0.01 m
R = 3.5 cm * 0.01 m/cm = 0.035 m

Rearrange the formula to solve for N:

N = sqrt((2 * π * R * L) / (μ₀ * A * h))

Since A is not provided, you will need the value of the square cross-sectional area to calculate the exact number of turns (N). Once you have that value, plug it into the formula, and solve for N.

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The effective collecting area of this radio telescope with a sensitivity of 1 \(\frac{K}{Jy}\) is 2761 square meters.

Given the following data:

In Science, the sensitivity of a radio telescope is its sensitivity and it is usually expressed by using a convenient parameter in units of \(\frac{K}{Jy}\).

Mathematically, an antenna temperature produced by an unpolarized point source with respect to flux density is given by this formula:

\(T_A=\frac{SA_e}{2k}\)

Making effective area the subject of formula, we have:

\(A_e=\frac{2kT_A}{S}\)

Substituting the given parameters into the formula, we have;

\(A_e=\frac{2 \times 1.38065 \times 10^{-23} \times 1}{10^{-26}}\\\\A_e= 2761 \;m^2\)

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For the student that walks to the right 25 m in 15 s and then turns and walks to the left 15 m in 8.0 s, we have:

1. The average speed is 1.74 m.

2. The average velocity is 1.42 m.

1. The average speed is an scalar wich is given by:

\( V = \frac{d_{t}}{t_{t}} \)

Where:

\(d_{t}\): is the total distance

\(t_{t}\): is the total time

The total distance and the total time can be calculated as follows:

\(d_{t} = d_{1} + d_{2} = 25 m + 15 m = 40 m \)

\( t_{t} = t_{1} + t_{2} = 15 s + 8.0 s = 23 s \)

Since V is a scalar, the direction of motion is not important to calculate the final value.

Then, the average speed is:

\( V = \frac{d_{t}}{t_{t}} =\frac{40 m}{23 s} = 1.74 m/s \)

2. The average velocity is a vector, so the direction of motion is important here. This ΔV can be calculated with the following equation:

\( \Delta V = \frac{\Delta x}{\Delta t} = \frac{x_{f} - x_{i}}{t_{f} - t_{i}} \)

Where:

x: is the displacement  

f: is for final and i: is for initial

Hence, the average velocity is:

\( \Delta V = \frac{x_{f} - x_{i}}{t_{f} - t_{i}} = \frac{15 m - 25 m}{8.0 s - 15 s} = 1.42 m/s \)

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The highest trophic level has the least available energy in kilojoules.

Even though the food web is not shown in the question, but we know that energy decreases steadily as it is passed on from one trophic level to the next according to the second law of thermodynamics.

Energy enters into the system from the sun. The primary producers utilize this energy to produce food. As plants are eaten by animals, this energy is transferred along the food web an diminishes at each higher trophic level.

At the highest trophic level, the the least available energy in kilojoules in this food web is found.

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Around 3 p.m., when the sun is sufficiently low in the sky, more heat is lost than is received.

Even though the sun's beams are most direct around noon, the afternoon is the warmest part of the day because air temperatures close to the earth's surface will continue to rise as long as incoming solar radiation outweighs outgoing longwave earth radiation.

Around 3 p.m., it gets the warmest. When the sun is at its zenith in the sky, or after midday, heat continues to accumulate as long as more heat is entering the earth than is leaving. When the sun is low enough in the sky, around 3 p.m., more heat is lost than is gained.

Many people believe that noon is when it gets the warmest. We receive the maximum energy from the sun at noon, which may make it feel hotter. But during the day, Earth is accumulating heat or energy from incoming sources. The air becomes warmer as the day goes on.

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The unmodulated transmission of a radio or television station is called the carrier signal.

The carrier signal is a continuous wave, typically at a fixed frequency, that carries no information itself but serves as a carrier for the modulation of audio or video signals. Modulation is the process of impressing information onto the carrier signal, allowing the transmission of audio or video content.

In radio broadcasting, the carrier signal is modulated by the audio signal using techniques such as amplitude modulation (AM) or frequency modulation (FM).

Similarly, in television broadcasting, the carrier signal is modulated by the video and audio signals using methods like amplitude modulation (AM) or vestigial sideband modulation (VSB).

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Answer:

A. positive reinforcement

Explanation:

Assuming Adam dislikes veggies and likes ice cream...

Adam is being conditioned to eat his vegetables via positive reinforcement.

Punishment would be a negative result from eating him vegetables.

Negative reinforement is pretty much the same thing as punishment.

Extinction would mean he stopped getting what he wanted for the action he didn't like (eating veggies) and stopped doing it.

This question can be solved using the concept of friction energy.

The thermal energy change is b "258.4 J".

The change in thermal energy will be equal to the friction energy produced during the motion of the box.

\(Change\ In\ Thermal\ Energy = E = Friction\ Energy\\\\E = \mu fd\)

where,

μ = coefficient of kinetic friction = 0.4

f = force applied = 38 N

d = distance traveled by the box = 17 m

Therefore,

\(E = (0.4)(38\ N)(17\ m)\)

E = 258.4 J

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Answer:

Explanation:

As per the given information, 18(O) is struck by a proton, and 18(F) and another particle are produced. The reaction has a Q value of -2.453 MeV, and the atomic mass of 18(O) is 17.999 160 u.

We have to find the atomic mass of 18(F). The Q value of a nuclear reaction can be given as Q = (Mi - Mf - Mp) × c²WhereQ = Q

value of the nuclear reaction = initial massMf = final massMp = mass of the projectile = speed of light

The Q value of the given nuclear reaction is -2.453 MeV. Since we know the initial mass (Mi) and the mass of the projectile (Mp), we can calculate the final mass (Mf) as follows: Mf = Mi - Mp - (Q / c²)Now, let's calculate the final mass of 18(F).

Initial mass (Mi) = mass of 18(O) = 17.999 160 UMass of the projectile (Mp) = mass of a proton = 1.007 825 uQ value (Q) = -2.453 MeVSpeed of light (c) = 2.998 × 10⁸ m/sMf = 17.999 160 u - 1.007 825 u - (-2.453 MeV / (2.998 × 10⁸ m/s)²)Mf = 18.000 674 therefore, the atomic mass of 18(F) is 18.000 674 u.

Answer:

D

Explanation:

The force exerted by a magnet is called The push or pull of magnetism can act at a distance, which means that the magnet does not have to touch an object to exert a force on it. ... In fact, magnetism is the result of a moving electric charge.Explanation:

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1. Heat causes magnetic bodies to lose their magnetic force. For each material of magnet, there is a Curie temperature, or temperature at which the heat will destroy the polarization of the material, causing it to loses its magnetic properties.

2. In unmagnetized materials the domains are randomly aligned in different directions and cancel each other out. In a magnet, all the domains are oriented in the same direction. In the case of a nail, the domains can be aligned in the same direction causing the nail to become magnetic.

3. because after got attracting they will also got act as magnets since they would also get North and South poles so in the case of same poles they had repulsion.

4. We know that magnetic fields exert forces on moving electrons for example. ... When you are in the middle of the magnet, the metal object is being pulled more or less equally in both directions, and so the result is that the object doesn't really feel a force in either direction, they cancel each other out.

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Explanation:

Average speed =total distance ÷ total time

speed = d ÷ t

d= 74400

t= 16

then,

speed = 74400÷16

=4650

The final momentum of the skater is 3.77 m/s.

Momentum is the product of mass and acceleration. Recall that the principle of conservation of linear momentum states that total momentum before collision must equal the total momentum after collision.

Thus;

(50 Kg × 0 m/s) + (55Kg ×  7.2m/s) = (50 Kg + 55Kg) v

v =  (55Kg ×  7.2m/s)/(50 Kg + 55Kg)

v = 396/105

v = 3.77 m/s

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Answer:

3 m/s ^2 rounded to one signifiicant figure.

Explanation:

Hope this helped!

Answer:

D. 1R=1r1+1r2+1r3

Explanation:

If three components are arranged to form a parallel circuit, and the individual resistance of these components are r1, r2, and r3 respectively, the formula for finding the total resistance R is: 1R=1r1+1r2+1r3.

Answer:

Interpolation

Explanation:

The graph shows that it falls between 2 values and interpolation means that you estimate the unknown values that fall between the 2 values. Hope this helps!

The data point A is between two given data points and it lies within the line connecting the data points, thus we can conclude that point A is an example of interpolation.

Extrapolation is the process of extending a line connecting the data points beyond the given data points to make inferences based on the previous trend of the data set. This helps us to understand what will happen in the future if the trend continues in the same manner.

Interpolation is the process of determining an unknown variable between two known variables. In this process the data point is located within the line connecting the data points.

In this given graph, the data point A is between two given data points and it lies within the line connecting the data points, thus we can conclude that point A is an example of interpolation.

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