Unlike a transverse wave, a longitudinal wave has a. no amplitude. b. no frequency. c. no wavelength. d. no speed. e. ...a longitudinal wave has all of these.

Answer:

The total work done by the net force is equal to the product of the net force and the displacement, so the total work done by the box is equal to the net force multiplied by 5m, or F•d = 5F.

Some knowledge of radioactivity would be useful for understanding the certain medical procedures. Option A is correct.

The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.

Radiation is being employed to assist humanity in medical, academia, and industry, as well as to generate power.

Radiation is also important in agriculture, archaeology, space exploration, law enforcement, geology a variety of other fields.

Some knowledge of radioactivity would be useful for understanding the certain medical procedures.

Hence, option A is correct.

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Gains speed because Acceleration is defined as the rate of change of velocity, which can be positive (speed increase) or negative (speed decrease). In the case of a motor scooter, when it gains speed.

Measuring the rate at which a moving entity's speed and direction change over time. When a point or thing accelerates / decelerates, it is moving straight forward. Motion on a circle increases even if the speed is constant because the vector is always changing.

A = v/t stands for acceleration, which is the product of the alteration in speed (v) and the shift in time (t) (t). You may use this to figure out the variation in velocity in m/s² (metres per second squared).

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If you decrease the atmospheric pressure around water at room temperature, it will result in a decrease in its boiling point. Here's an explanation of why this happens:

Relationship between Pressure and Boiling Point: The boiling point of a substance is the temperature at which its vapor pressure equals the atmospheric pressure.

At higher pressures, the vapor pressure required for boiling is also higher, resulting in a higher boiling point. Conversely, if you decrease the atmospheric pressure, the vapor pressure needed for boiling decreases, leading to a lower boiling point.

Effect of Decreased Pressure on Water: Normally, at standard atmospheric pressure (1 atm or 101.3 kPa), water boils at 100 degrees Celsius (212 degrees Fahrenheit).

However, if the atmospheric pressure is reduced, such as at higher altitudes or in a vacuum, the boiling point of water decreases. For example, at the top of a mountain with lower atmospheric pressure, water can boil at temperatures lower than 100 degrees Celsius.

Intermolecular Forces: The boiling point of water is primarily determined by intermolecular forces between water molecules. These forces, known as hydrogen bonding, are relatively strong and require a certain amount of energy to break for the liquid water to turn into vapor during boiling.

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The value of resistor R that gives the circuit in the figure a time constant of 22 μs is 220 Ω.

The circuit that is in the figure is shown below:Given that time constant (RC) = 22 μs. To find the value of resistor R, we need to use the formula for the time constant:

RC = τ, where R is the resistance and C is the capacitance of the circuit.

Rearranging the above formula, we get:R = τ / C

Where τ is the time constant and C is the capacitance of the circuit.

From the figure, the capacitance is given as 0.1 μF

.Substituting the values of τ and C in the above formula, we get:

R = (22 × 10⁻⁶ s) / (0.1 × 10⁻⁶ F)

R = 220 Ω

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Answer:

it is being accountable basically like some one can relive and trust that you'll do what you say your going to do

The bright-line emission spectrum of an element can best be explained by the electrons transitioning between the discrete energy levels in the atoms of that element.

The electron is a subatomic particle with a bad standard electric charge. Electrons belong to the primary technology of the lepton particle's own family and are typically thought to be fundamental particles because they have no recognized additives or substructure.

For most realistic purposes, an electron is a structureless particle with an intrinsic angular momentum or spin. simply two numbers — the electron's mass and its electric price — gasoline the equations that describe its behavior. From this 'sensible electron' version, physicists constructed present-day microelectronics.

By using the best values for the wavelength and the scattering by a matter of tough X-rays and ?-rays, the radius of the electron is anticipated as approximately 2 × 10-10 cm.

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The change in potential energy of an energetic 65 kg hiker who makes it from the floor of Death Valley to the top of Mt. Whitney is approximately 28.9 million joules.

The change in potential energy of a 65 kg hiker who makes it from the floor of Death Valley to the top of Mt. Whitney can be calculated using the formula for potential energy, which is PE = mg, where m is the mass of the object, g is the acceleration due to gravity (9.81 m/s^2), and h is the change in height.

First, we need to convert the elevation of Mt. Whitney from meters to centimeters, which is 442,000 cm. The elevation of Death Valley, which is 85 m below sea level, can be converted to centimeters as well, which is -8,500 cm.

Using the formula, the change in potential energy is calculated as follows:

PE = (65 kg)(9.81 m/s^2)(442,000 cm - (-8,500 cm))
PE = 65 kg x 9.81 m/s^2 x 450,500 cm
PE = 2.89 x 10^7 J

Therefore, the change in potential energy of an energetic 65 kg hiker who makes it from the floor of Death Valley to the top of Mt. Whitney is approximately 28.9 million joules.

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Answer:

left side

Explanation:

It's smaller in length but still has a pretty close slope to the right side.

Answer:

B. less than mg

Explanation:

A person's weight changes as he rides an elevator at a constant velocity. If the elevator is moving downward, the person's weight becomes lesser. He is considered to be in "free fall" due to gravity. However, the opposite happens when the elevator goes upward. The person will feel heavier because he is going against gravity. This means his weight is more than his actual weight. If the person will stand on an elevator that doesn't move, his weight will just be the same. All of these is due to Newton's Second Law of Motion where an object's acceleration relies on its force and mass.

The work done by the turbine per unit mass of air is given by,

\(W = c p (T 3 - T 4 ) \\= c p (T 2 - T 1 )Here, \\T1 = 283 K, \\T2 = T1 + 200 \\= 483 K, \\T3 = T2 + 722 \\= 1205 K, \\T4 = T1 + 273 \\= 556 Kc \\p = 1.005 kJ/(kg K)\)

Thus, the work done by the turbine is,

\(W = 1.005 (1205 - 556) \\= 680.745 kJ/kg\)

The fuel used by the turbine has a heating value of 43 MJ/kg. Thus, the fuel required per unit of work is given by, Fuel per unit of work \(= 43 × 10⁶ / 680.745\\ = 63034.8 kJ/kg\)

Answer: The fuel flow rate required for 1 MW output is 0.026 kg/s. The rate in kg/s at which fuel must be burned for each MW of output from the power plant is 0.026 kg/s.

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Answer:

\(the \: net \: force = \: 50 - 15 = 35.\)

Answer:

Net force is going to be GREATER FORCE - LESS FORCE if they are working in opposite direction

so,

         50N - 15N = 35N

Answer:

\(\boxed {\boxed {\sf 100 \ Newtons}}\)

Explanation:

We are asked to calculate the force you are applying to a car. According to Newton's Second Law of Motion, force is the product of mass and acceleration. Therefore, we can use the following formula to calculate force.

\(F= m \times a\)

The mass of the car is 2000 kilograms and the acceleration is 0.5 meters per second squared.

Substitute the values into the formula.

\(F= 2000 \ kg \times 0.05 \ m/s^2\)

Multiply.

\(F= 100 \ kg *m/s^2\)

Convert the units. 1 kilogram meter per second squared is equal to 1 Newton. Our answer of 100 kilogram meters per second square is equal to 100 Newtons.

\(F= 100 \ N\)

You apply 100 Newtons of force to the car.

Answer:

https://earthobservatory.nasa.gov/features/EnergyBalance#:~:text=The%20atmosphere%20absorbs%2023%20percent,surface%20radiates%20only%2012%20percent.

Explanation:

The circulation of the line vortex is 4 m/s.  

In a line vortex, the circulation is defined as the product of the velocity of the fluid and the distance from the center of the vortex. To find the circulation of a line vortex, we need to know the velocity of the fluid at a given distance from the center of the vortex.

Assuming that the downward velocity at a point 2 meters orthogonally from the line vortex is 2 m/s, we can use the equation for the velocity of the fluid in a line vortex to find the circulation:

Circulation = 2 * r

where r is the distance from the center of the vortex.

In this case, the velocity of the fluid is 2 m/s and the distance from the center of the vortex is 2 meters. Plugging these values into the equation, we get:

Circulation = 2 * 2 = 4 m/s

Therefore, the circulation of the line vortex is 4 m/s.  

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Answer: 11 m/s

vinitial=2 m/s

time=3 s

acceleration = 3 m/s^2

vfinal = ?

The key here is that it is a constant acceleration, so we can use the constant acceleration equations. The easiest one to use would be:

vfinal=vinitial + a*t

We need vfinal, so algebraically we are ready to put in numbers into the equation:

vfinal=vinitial + a*t = 2 m/s + (3 m/s^2)*(3 s ) = 11 m/s is the final velocity

The ball's final velocity is 11 m/s

From one of equations of kinematics for linear motion

We have that

v = u + at

Where v is the final velocity

u is the initial velocity

a is the acceleration

and t is the time

From the given information in the question

u = 2 m/s

t = 3 secs

a = 3 m/s²

Putting these parameters into the above formula

v = u + at

We get

v = 2 + (3×3)

v = 2 + 9

v = 11 m/s

Hence, the ball's final velocity is 11 m/s

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The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.

When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.

According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.

According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.

According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.

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if a 1.5 microfarad capacitor is charged to 60 v. the charging battery is then disconnected and a 12 millihenry coil is connected in series with the capacitor so the lc oscillations occur then the maximum current in the coil is 7.13 A.

When the capacitor is charged to 60 V, it stores an electric charge, Q, given by Q = CV, where C is the capacitance and V is the voltage. Therefore, Q = (1.5 microfarads) x (60 volts) = 90 microcoulombs.
When the battery is disconnected and the coil is connected in series with the capacitor, an LC circuit is formed. The energy stored in the capacitor is now transferred to the coil, causing it to oscillate at its natural frequency. The maximum current in the coil occurs when the energy stored in the capacitor is maximum, which is given by E = (1/2) x C x V^2.
Therefore, E = (1/2) x (1.5 microfarads) x (60 volts)^2 = 324 millijoules.
The maximum current in the coil, I, is given by I = sqrt(2E/L), where L is the inductance of the coil. Therefore, I = sqrt(2 x 0.324 J / 12 mH) = 7.13 A.
Thus, the maximum current in the coil is 7.13 A.

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To reduce magnetic flux density, it is necessary to reduce the voltage to a motor when the frequency is reduced. This will resist lowering of inductive reactance and increase of rotor current

When we decrease voltage applied to the motor. The current in stator is winding as well as the magnetic flux density will decrease along with decrease in induced voltage.

The voltage induced over rotor's conductor is defined here

,\(V_{R\) = B.l.u

We can see things in other way also. Changing frequency has effect on  both the motor speed and the strength of the magnetic field. With the lowering of frequency motor speed becomes slow.

With reduction in voltage, magnetic field decreases and magnetic flux becomes constant. This keeps torque production stable, regardless of frequency.

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The characteristic impedance of the two 1-oz cu lands 100 mils in width that are located on opposite sides of a 47-mil glass epoxy board is approximately 47.4 ohms.

The characteristic impedance (Z0) of a transmission line depends on the geometry of the line and the dielectric constant of the material between the conductors. The formula for the characteristic impedance of a microstrip transmission line is:

Z0 = (87.3 + 100*(w/h)ln(4w/h)) * (h/w)

where w is the width of the trace, h is the height of the substrate, and ln is the natural logarithm.

Assuming a standard FR-4 epoxy substrate with a dielectric constant of 4.5, and using the formula above with w = 100 mils (0.1 inch) and h = 47 mils (0.047 inch), we get:

Z0 = (87.3 + 100*(0.1/0.047)ln(40.1/0.047)) * (0.047/0.1) = 47.4 ohms

Therefore, the characteristic impedance of the two 1-oz cu lands 100 mils in width that are located on opposite sides of a 47-mil glass epoxy board is approximately 47.4 ohms.

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Answer: \(-\frac{1}{2}\times \frac{d[Br^.]}{dt}=+\frac{d[Br_2]}{dt}\)

Explanation:

Rate of a reaction is defined as the rate of change of concentration per unit time.

Thus for reaction:

\(2Br^.\rightarrow Br_2\)

The rate in terms of reactants is given as negative as the concentration of reactants is decreasing with time whereas the rate in terms of products is given as positive as the concentration of products is increasing with time.

\(Rate=-\frac{d[Br^.]}{2dt}\)

or \(Rate=+\frac{d[Br_2]}{dt}\)

Thus \(-\frac{d[Br^.]}{2dt}=+\frac{d[Br_2]}{dt}\)

The amount of heat required to raise the temperature of 10 g of water through 2°C is 83.68 Joules.

To determine the amount of heat required to raise the temperature of 10 g of water through 2°C, we will use the formula:Q = m × c × ΔT

Where Q is the amount of heat required, m is the mass of the substance being heated, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

So, for 10 g of water, the mass (m) would be 10 g.

The specific heat capacity (c) of water is 4.184 J/(g°C), so we'll use that value.

And the change in temperature (ΔT) is 2°C.

Substituting these values into the formula, we get:Q = 10 g × 4.184 J/(g°C) × 2°CQ = 83.68 Joules

Therefore, the amount of heat required to raise the temperature of 10 g of water through 2°C is 83.68 Joules.

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The acceleration of the particle is constant \((a=9.8 m/sec^2)\), and it is vertically downward. Therefore, the correct option is diagram no 4.

In the case of a projectile launched into the air, the acceleration acts vertically and is influenced by gravity.

Let's analyze the three points along the path of the projectile:

1. On its way up: At this point, the projectile is moving upwards, and gravity is acting in the downward direction. Therefore, the acceleration of the projectile at this point is directed downward to oppose the upward motion and eventually bring the projectile to a stop.

2. At the top: The projectile reaches its maximum height and momentarily comes to a stop before starting to fall back down. At this point, the acceleration is solely due to gravity, and it acts vertically downward. The acceleration at the top of the projectile's path is directed downward.

3. On its way down: The projectile is now moving downward, and gravity continues to act in the downward direction. The acceleration at this point is again directed downward, assisting the downward motion of the projectile.

Considering these factors, the drawing that correctly represents the acceleration of the projectile at these three points should show the acceleration vector pointing vertically downward in all three positions.

This represents the consistent influence of gravity on the projectile throughout its motion.

Therefore, the correct option is diagram no 4. The acceleration of the particle is constant \((a=9.8 m/sec^2)\), and it is vertically downward.

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Answer:

I think it's 5.00 N

Explanation:

Given that copper's electron mobility is 3 10-3 m2/v-s, there are 1.20 × 10⁷ conducting electrons per cubic meter in copper.

The mobility of holes and electrons in semiconductors and metals is the subject of this essay. See Electrical mobility for a broad explanation. The electron mobility in solid-state physics refers to how quickly an electron may move through with a metal or semiconductors when being drawn by an electric field. Hole mobility is the corresponding quantity for holes. Both electron / hole mobility are collectively referred to as carrier mobility. The electrical mobility if charge particles in a fluid under such an applied electric field includes electron / hole mobility as specific examples.

The equation =VdE allows us to mathematically demonstrate electron mobility. The SI symbol for electron mobility when subject to an external electric field is m2V1s1. We can see that [M1T2A] is its dimensional form when the SI unit's dimensions are calculated.

resistivity of the copper (p) = 1.73 × 10⁸ Ωm

η = σ/μe

Here, σ = electrical conductivity

σ = 1/ρ

e = charge on electrons = 1.6 × 10⁻¹⁹

μ = mobilty of electrons

n = σ/μe

n = 1/ρμe

n = 1/8.304 × 10⁻⁸

n = 10⁸/8.304

n = 1.20 × 10⁷ electrons/ m³

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Answer:

The resultant displacement is 140 cm

Explanation:

say first displacement d₁ is 60 cm

and second displacement d₂ is 80 cm

Resultant displacement = d₁ + d₂

= 60 + 80

= 140 cm

Answer:

Explanation:

To solve this problem it will be necessary to apply the interference principle.

Under this principle interference is understood as a phenomenon in which two or more waves overlap to form a resulting wave of greater, lesser or equal amplitude. In this case, if both are at the same point, the result of the total displacement will be the sum of the individual displacements, therefore

\(x = \sum h_i\\\\x = 60cm + 80cm\\\\x =140cm\)

The average speed of the dragon fly for the interval from t = 0 to t = 8 s is 1 m / s

v = d / t

v = Average velocity

d = Total distance flown

t = Total time taken

d = 2 m ( Positive x-direction ) + 4 m ( negative x-direction ) + 2 m ( Positive x-direction )

d = 8 m

t = 8 s

v = 8 / 8

v = 1 m / s

Average speed is the average value of speed for a given distance at a given time. It can also be found using the initial and final velocities if the acceleration is constant.

The given question is incomplete. The complete question is:

A confused dragonfly flies forward and backward in a straight line. Its motion is shown on the following graph of horizontal position xx vs. time tt. What is the average speed of the dragon fly for the interval from t = 0 to t = 8 s? The graph is attached as image.

Therefore, the average speed of the dragon fly is 1 m / s

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The statement that transmission of culture occurs between related and unrelated individuals, as well as through various forms of media, is true.

This means that cultural transmission is not restricted to the parent-offspring relationship, and can occur through social interactions with peers, teachers, and other individuals, as well as through media such as books, television, and the internet. While genetic transmission is limited to the passing on of genes from parent to offspring, cultural transmission is a more complex process that can involve multiple sources and methods of transmission.

Genetic transmission is the process through which genes are passed from parent organisms to their progeny. It takes place during reproduction when genes, which are sections of DNA, are passed from one generation to the next, assuring the inheritance of traits and characteristics.

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