a silver wire has a resistance of 13.2 ohms at 20 c. what resistance does it have at 39 c

Exoplanets are found outside of solar systems but not inside it.

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The wavelength of light is 525nm.

explanation:

given data

Slit distance d=5×10−3m

Distance between slot and screen, D = 4.0 m

Bandgap, Δx = 4.2 x 10−4 m

seek:

wavelength of light λ = ?

From Young's double-slit experiment, we know that the formula for calculating the wavelength is: 

λ = Δx \(\frac{d}{D}\)

Substituting the already known values, we get

wavelength of light, λ = 5.25 x  10^-9 m

                                   = 525 x 10^-7  m

                                   = 525 nm

The wavelength of light is 525 nm.

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Answer:

5.3 x 10−7 m

Explanation:

I got it right on the test.

The question is asking whether it is possible to find a magnetic vector potential for a given uniform surface current flowing in the xy plane and generating a magnetic field for different regions of space.

To determine whether it is possible to find a magnetic vector potential for the given scenario, we need to consider the conditions that must be satisfied. In general, a magnetic vector potential A can be found if the magnetic field B satisfies the condition ∇ × A = B. This is known as the magnetic vector potential equation.

In the given situation, the magnetic field is different for the regions above and below the xy plane. For z > 0, the magnetic field is described as B = MoK -î, and for z < 0, it is described as B = -MoK -î. To find the magnetic vector potential, we need to determine if there exists a vector potential A that satisfies the equation ∇ × A = B in each region.

By calculating the curl of A, we can check if it matches the given magnetic field expressions. If the curl of A matches the magnetic field expressions for both regions, then it is possible to find a magnetic vector potential for the given scenario. However, if the curl of A does not match the magnetic field expressions, then it is not possible to find a magnetic vector potential that satisfies the conditions.

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Answer:

Acceleration → Change in velocity divided by time.

Proportional → Net force and acceleration

Inversely Proportional → Mass and acceleration

Net force Not Equal to zero → Driving a car up the on-ramp of the freeway

Net force Equal to zero → Driving a car with cruise control on, straight down.

Acceleration → Net force divided by mass

Force → Mass times acceleration.

Explanation:

Below we will explain each choice.

A) Acceleration by means of the following expression of kinematics is defined as the change of velocities in a given time.

\(a=\frac{v_{f}-v_{o}}{t}\)

where:

a = acceleration [m/s²]

Vf = final velocity [m/s]

Vo = initial velocity [m/s]

t = time [s]

B)

Newton's Second Law tells us that the sum of forces in a body is equal to the product of mass by acceleration so we have the following expression.

F = m*a

where:

F = force [N] (units of Newtons)

m = mass [kg]

a = acceleration [m/s²]

As we can see in the previous equation The Force is proportional to the acceleration, that is to say, every time the acceleration increases or decreases this same will happen with the force, increases or decreases.

C)

In Newton's second law we see an inversely proportional relationship, which is best seen if we clear the term of acceleration.

\(a=\frac{F}{m}\)

In any mathematical expression where a term is in the denominator, we can say that this is inversely proportional to the term to the left of the equal sign.

D)

When a vehicle climbs a hill or climbs a slope, forces such as the weight of the vehicle act in the opposite direction to the movement, so the sum of the forces cannot be equal to zero.

E)

When a vehicle moves on a track at a constant speed that is to say at cruising speed, we say that its acceleration is zero, therefore the sum of the forces acting on the moving vehicle is equal to zero.

F)

Acceleration is defined as the relationship between Force and mass

\(a =\frac{F}{m}\)

G)

Force is defined as the product of mass by acceleration.

F = m*a

The journey of the chicken takes 30 minutes at a speed of 9.3 miles per hour. It traveled 4.65 miles in this amount of time and at this speed. Choice B is correct as a result.

Speed is a term used in physical science to describe how far a moving body may travel in a given amount of time. It is the ratio of time to distance in mathematics.

It is assumed that the chicken moves at a speed of 9.3 miles per hour (mph). With this speed, a distance may be covered in 30 minutes. 60 minutes make up an hour. So, 30 minutes equals 30/60, or 0.5 hours.

Then the distance is calculated as follows:

distance = speed × time

= 9.3 mph × 0.5 hr

= 4.65 miles.

Hence, the distance covered by the chicken is 4.65 miles.

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Where lighting units, cord- and plug-connected utilization equipment not fastened in place, or both, are also supplied, the overall rating of fastened-in utilization equipment, excluding luminaires, shall not be greater than 50% of the branch-circuit ampere rating.

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The value of m for the diffraction maximum is approximately 18.

The diffraction grating has a ruling density of 3 750 rulings/cm, which means that the distance between adjacent rulings is:

d = 1 / (3750 rulings/cm) = 2.67 × \(10^{-4}\)cm

The distance between adjacent maxima for the two sodium wavelengths is given as:

Δy = 1.87 mm = 1.87 × \(10^{-1}\)cm

d sin θ = mλ

For the two closely spaced wavelengths of sodium, we have:

d sin θ = mλ1    (1)

d sin θ = mλ2    (2)

where λ1 = 589.0 nm = 5.89 × \(10^{-5}\)cm and λ2 = 589.6 nm = 5.896 × \(10^{-5}\)cm.

Subtracting equation (2) from equation (1), we get:

d sin θ = m(λ1 - λ2)

Rearranging this equation, we have:

m = (d sin θ) / (λ1 - λ2)

sin θ ≈ tan θ ≈ y / L

where y is the separation between the maxima on the screen, and L is the distance between the grating and the screen.

Substituting the given values, we have:

sin θ ≈ (1.87 × \(10^{-1}\)cm) / (3.00 m) = 6.23 × \(10^{-6}\)

Now we can calculate the value of m:

m = (d sin θ) / (λ1 - λ2)

m = [(2.67 × \(10^{-4}\)cm) × (6.23 × \(10^{-6}\))] / [(5.89 × \(10^{-5}\) cm) - (5.896 × \(10^{-5}\)cm)]

m ≈ 18

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Answer:

Explanation:

How did media attention affect Barack Obama's presidential performance?(A)(B)(C)(D)He made a concerted effort to listen to Congress' concerns about his policies.He decided to go on Fox News in an attempt to win over Republican voters.He started traveling the country to give speeches about his policy goals.He began meeting in private with Speaker of the House Nancy Pelosi.

Two athletes are competing in upcoming competitions, a weightlifting meet and a marathon. phosphagen and oxidative energy systems will each be primarily used, respectively.

As it is in charge of high-intensity, brief-duration activity, the phosphagen energy systems generate energy for jumping and sprinting. The quickest and most effective energy producer in muscle activity. Phosphagen metabolism is demonstrated by this system. It uses creatine phosphate to produce ATP (adenosine triphosphate, the chemical which provides energy for all body processes).

Energy is produced by the oxidative energy systems using 30% and 70% of carbs and lipids, respectively. When done for at least 150 minutes a week, aerobic exercise enables the body to experience physiological and health benefits.

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(a) Using the ideal-gas equation is not appropriate for superheated water vapor since it does not behave ideally at high temperatures and pressures. Therefore, attempting to use the ideal-gas equation in this case would result in a significant error.

(b) The generalized compressibility chart is also not suitable for superheated water vapor, as it is primarily applicable to ideal gases. Using the compressibility chart for superheated water vapor would introduce a substantial error.

(c) The most accurate method is to consult the steam tables, which provide specific volume values for superheated water vapor at different temperatures and pressures. By referencing the steam tables at 3.5 MPa and 450°C, you can obtain the specific volume of superheated water vapor directly.

The error involved in using the ideal-gas equation or the generalized compressibility chart for superheated water vapor would be significant since these methods are not applicable to the behavior of water vapor under those conditions. Relying on the steam tables, which provide specific data for superheated water vapor, ensures more accurate results.

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Answer:

I believe the correct answer is 30m/s/s

Answer:

If you ring the doorbell and no one opens the door, you'll infer that no one is home rather than continuing to ring the doorbell to an empty house. Being able to understand this and look for another solution is another example of mental flexibility.

Explanation:

Answer:

D :)

Explanation:

When an impact causes the car to suddenly change its motion, (D) the people in the car will continue to move in the same direction and at the same speed as before the impact.

Newton's first law of motion states that Unless influenced by an imbalanced force, a body at rest stays at rest, and a body in motion keeps moving in a straight path at a constant pace. This law is commonly known as law of inertia and the resistance of a body to maintain its state of rest is called inertia of rest, same as, the resistance of a body to maintain its state of motion is called inertia of motion.

When a car is moving with certain speed, the car along with the people inside the car is in inertia of motion. In an event of accident, the car comes in rest in no time but the man in the car is still in inertia of motion. So, his body moves forward in the car which may cause injuries. To prevent such injuries, the people inside a car are advised to use safety belts.

So, correct answer  is option (D).

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Answer:

A

Explanation:

Ethanol fermentation causes bread dough to rise. Yeast organisms consume sugars in the dough and produce ethanol and carbon dioxide as waste products. The carbon dioxide forms bubbles in the dough, expanding it to a foam.

Fermentation of glucose by yeast produces ethyl alcohol and carbon dioxide. (option a)

Fermentation is a metabolic process that occurs in yeast and some other microorganisms when they lack oxygen. During this process, glucose, a simple sugar, is broken down into simpler compounds. The main goal of fermentation is to produce energy for the cell without the need for oxygen.

Yeast, a type of fungus, carries out alcoholic fermentation. In this process, yeast breaks down glucose into two primary products: ethyl alcohol (also known as ethanol) and carbon dioxide. The equation representing this fermentation process is as follows:

Glucose → Ethyl Alcohol + Carbon Dioxide + Energy

The carbon dioxide produced during fermentation is responsible for the formation of bubbles in dough, which causes bread to rise. It is also the reason behind the effervescence in alcoholic beverages like beer and champagne.

So, the correct option is (a).

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The angle θ is 72.97 and the speed vf is 4.27 m/s.

Net X momentum:

mv + 0 = (total mass)V.

50.0(3) = (50.0 + 70.0)V

V=1.25 m/s.

Net Y momentum

MV + 0 = (total mass)V.

70.0(-7.0) =  (50.0 + 70)V.

V=4.0833 m/s

(a)According to conservation of momentum we have along x-direction:

 m1 u1 = M Vfcosθ

Along the vertical direction

         m2 u2 = M Vfsinθ

==> m2 u2 / m1 u1  = tanθ

==> tanθ =  7 * 7 / 5 * 3

              = 3.2666

==> θ = 72.97

(b) Therefore

         Vf = m 1 u1/ M cosθ

             = 5 * 3 / 12 * cos72.97

            = 4.27 m/s

What is speed?

Velocity is the distance traveled per unit time. It's how fast an object is moving. Velocity is a scalar quantity that is the magnitude of the velocity vector. No direction. Faster speed means the object is moving faster. Slow speed means slow movement. If you don't move at all, you have no speed.

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The charges for each cylinder are approximately: First cylinder: 4201.05 nC, Second cylinder: 6001.5 nC, Third cylinder: 72018.0 nC, and Fourth cylinder: 90022.5 nC

Radius (r) = 2.41 cm

Length (h) = 5.40 cm

First cylinder:

Charge density = 35 nC/m²

Area = 2πr(r + h)

Area = 2π(2.41 cm)(2.41 cm + 5.40 cm)

Area ≈ 2π(2.41 cm)(7.81 cm)

Area ≈ 120.03 cm²

Charge = Charge density x Area

Charge = 35 nC/m² x 120.03 cm²

Charge ≈ 4201.05 nC

Second cylinder:

Charge density = 50 nC/m²

Area = 2πr(r + h)

Area = 2π(2.41 cm)(2.41 cm + 5.40 cm)

Area ≈ 120.03 cm²

Charge = Charge density x Area

Charge = 50 nC/m² x 120.03 cm²

Charge ≈ 6001.5 nC

Third cylinder:

Charge density = 600 nC/m²

Area = 2πr(r + h)

Area = 2π(2.41 cm)(2.41 cm + 5.40 cm)

Area ≈ 120.03 cm²

Charge = Charge density x Area

Charge = 600 nC/m² x 120.03 cm²

Charge ≈ 72018.0 nC

Fourth cylinder:

Charge density = 750 nC/m²

Area = 2πr(r + h)

Area = 2π(2.41 cm)(2.41 cm + 5.40 cm)

Area ≈ 120.03 cm²

Charge = Charge density x Area

Charge = 750 nC/m² x 120.03 cm²

Charge ≈ 90022.5 nC

Therefore, the charges for each cylinder are approximately:

First cylinder: 4201.05 nC

Second cylinder: 6001.5 nC

Third cylinder: 72018.0 nC

Fourth cylinder: 90022.5 nC

The question should be:
Four solid plastic cylinders all have radius 2.41 cm and length 5.40 cm. find the charge of each cylinder given the following additional information about each one. The first cylinder has uniform charge density of 35 nC/m^2, second one has 50 nC/m^2, the third one has 600, and the fourth one has, 750 nC/m^2.

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Answer:

i think b sorry if im wrong!

Explanation:

The final speed of the ball when it accelerate uniformly at a rate of 3.52 m/s² for 23.3 m is 12.81 m/s.

Speed can be defined as the ratio of distance to time.

The S.I unit of speed is m/s.

To calculate the final speed of the ball, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the final speed of the ball is 12.81 m/s.

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You double your distance from a sound source that is radiating equally in all directions. The intensity of the sound reduces to one-sixteenth its original value.

The pace at which light disperses over a surface of a specific region some distance from a source is referred to as intensity. The intensity changes depending on the source's power and distance from it.

The degree, volume, or magnitude of something is its intensity. Examples include fire, emotion, weather, work, or passion. The word "intensity" is occasionally linked to fervour, fire, and violence. It is employed when describing the intensity of something like a flame or possibly a love affair.

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NOTE: The given question is incomplete on the portal. Here is the complete question

QUESTION: You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity of the sound? It reduces to

(A) one-fourth its original value.

(B) one-eighth its original value.

(C) one-sixteenth its original value.

(D) none of the above

The correct option is: Both (a) and (b) are responsible for the heat.

When hydrogen burns in air, the reaction produces water (H₂O) according to the equation: 2H₂ + O₂ → 2H₂O. In this exothermic reaction, heat is given off as a result of energy changes during bond breaking and bond formation.

In the reaction, breaking the hydrogen bonds (H-H) requires an input of energy, as bonds need to be broken. However, forming the hydrogen-oxygen bonds (H-O) in water releases energy, as new bonds are being formed.

Similarly, breaking the oxygen bonds (O=O) requires energy, while the formation of the oxygen-hydrogen bonds (O-H) in water releases energy.

Therefore, both the breaking of hydrogen bonds and breaking of oxygen bonds require energy input, but the energy released from forming the hydrogen-oxygen bonds is greater, resulting in a net release of heat.

As a result, both (a) breaking hydrogen bonds and (b) breaking oxygen bonds are responsible for the heat generated during the combustion of hydrogen in air.

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Complete question here:

Heat is given off when hydrogen burns in air according to the equation 2H2 + O2==>2H20

Which of the following is responsible for the heat?

Breaking hydrogen bonds gives off energy.

Breaking oxygen bonds gives off energy.

Forming hydrogen-oxygen bonds gives off energy

Both (a) and (b) are responsible.

(a), (b), and (c) are responsible.

The rationale behind the construction of phylogenetic trees is based on the principle of common descent and the evolutionary relationships between organisms.

Phylogenetic trees represent the evolutionary history and genetic relatedness among species or groups of organisms. They are constructed using various methods, including molecular data analysis, morphological traits, and fossil records.

By analyzing shared ancestral and derived characteristics, genetic similarities, and branching patterns, scientists can infer the evolutionary relationships and ancestry of different organisms.

Phylogenetic trees provide a visual representation of the evolutionary tree of life, helping us understand the evolutionary connections, diversification, and evolutionary history of species.

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The required density of the glass is given as 2.6 × 10³ kg/m³.

Volume is defined as the mass of the object per unit density while for geometry it is calculated as profile area multiplied by the length at which that profile is extruded.

Here,

Weight of glass in air = 52N
mg = 52N
m = 5.2 Kg

Now,
The difference in weight of glass in air and water,
Upthrust = Volume × density of water × g = 52-32
Volume × 1000 × 10 = 20
Volume = 2 × 10⁻³ m³

The density of glass = mass of glass/volume of glass
                           = 5.2/2 × 10⁻³
                           = 2.6 × 10³ kg/m³

Thus, the required density of the glass is given as 2.6 × 10³ kg/m³.

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It takes approximately 5.5 hours for light to travel from the Sun to Pluto

The distance from the Sun to Pluto varies depending on the positions of the two objects in their orbits, as both the Sun and Pluto are constantly moving. However, on average, the distance from the Sun to Pluto is about 5.9 billion kilometers or 3.7 billion miles.

The speed of light is approximately 299,792 kilometers per second or 186,282 miles per second.

Using these values, we can calculate that it takes approximately 5.5 hours for light to travel from the Sun to Pluto

5.9 billion km ÷ 299,792 km/s

=> 19710 seconds

=> 5.5 hours.

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Answer:

Explanation:

This problem bothers on the simple harmonic motion of a loaded spring

Given data

mass attached, m= 0-.675 kg

spring constant, k= 72.4 N/m

the period of oscillation can be solved for using the formula bellow

\(T= 2\pi \sqrt{\frac{m}{k} }\)

Substituting the given data into the expression above we have

\(T= 2*3.142\sqrt{\frac{0.675}{72.4} }\\T= 6.284*\sqrt{0.0093 }\\T= 0.6\)

T= 0.6 sec

Answer:

0.607

Explanation:

Trust me

A Brnsted-Lowry acid or Lewis acid is a molecule or ion that can either donate a proton (the hydrogen ion, H+) or establish a covalent bond with an electron pair. 

Proton donors, also known as Brnsted-Lowry acids, are the first class of acids. Proton donors, also referred to as Arrhenius acids, generate the hydronium ion H3O+ under the unique situation of aqueous solutions.

The Arrhenius theory was expanded upon by Brnsted and Lowry to take non-aqueous solvents into account.

A hydrogen atom is typically bound to a chemical structure in a Brnsted or Arrhenius acid that is still energetically advantageous after the loss of H+. Aqueous Arrhenius acids have distinguishing characteristics that serve as a useful definition of an acid.

Therefore, A Brnsted-Lowry acid or Lewis acid is a molecule or ion that can either donate a proton (the hydrogen ion, H+) or establish a covalent bond with an electron pair. 

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Answer:

In both cases, the sound and spelling are the same, and only the definition changes. Here are 30 more examples of homonyms. Note that some homonyms have more than two meanings (for example, "tender" can also mean sensitive, easily chewed, or even refer to chicken strips), but to keep things simple we've only included two in our homonyms list:

When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.

The width of the slit is approximately 3.68 μm.

The width of the slit can be determined using the formula for the diffraction pattern produced by a single slit:

sin(θ) = m * λ / w

where:

θ is the angle of the diffraction pattern,

m is the order of the minimum,

λ is the wavelength of the light, and

w is the width of the slit.

In this case, we are given the following information:

Distance between the first and third minima (y) = 2.90 mm = 2.90 × 10^(-3) m

Distance from the screen to the slit (L) = 55.0 cm = 0.55 m

Wavelength of light (λ) = 690 nm = 690 × 10^(-9) m

To find the width of the slit (w), we need to find the angle θ corresponding to the third minimum.

Using the small angle approximation, we can approximate sin(θ) ≈ θ, since θ is small.

Rearranging the formula, we have:

θ ≈ m * λ / w

For the third minimum (m = 3), we have:

θ ≈ 3 * λ / w

The distance on the screen corresponding to the third minimum (y) is related to the angle θ and the distance to the screen (L) as follows:

y ≈ L * θ

Substituting the approximations for θ and solving for w:

y ≈ L * (3 * λ / w)

w ≈ 3 * λ * L / y

Substituting the given values:

w ≈ 3 * (690 × 10^(-9) m) * (0.55 m) / (2.90 × 10^(-3) m)

Calculating the result:

w ≈ 3.68 × 10^(-6) m

Therefore, the width of the slit is approximately 3.68 μm (micrometers).

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Answer:

B

Explanation:

edge 2020

The emotional symptoms that may occur in those with a Schizophrenic disorder generally include all of the following except appropriate emotion. Hence, option (B) is correct.

Schizophrenia is a persistent, severe mental illness that has an impact on a person's relationships with others as well as their thinking, acting, and emotional expression. Despite not being as prevalent as other severe mental illnesses, schizophrenia can be the most persistent and incapacitating.

Schizophrenia patients frequently struggle to function well in relationships, the workplace, and academic settings. They can appear to have lost their sense of reality, feel afraid and withdraw. This chronic illness cannot be cured, but it can be managed with the right care.

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The non-contact force affected by mass and distance that tends to cause objects to move toward the center of a mass is called gravitational force. It is a fundamental force of nature that plays a crucial role in the behavior of celestial bodies and everyday experiences on Earth.

A non-contact force that is affected by mass and distance and tends to cause objects to move toward the center of a mass is called "gravitational force." Gravitational force is one of the fundamental forces in nature and is responsible for the attraction between objects with mass.

According to Newton's law of universal gravitation, the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This means that the larger the mass of an object, the stronger its gravitational force, and the closer two objects are, the stronger the gravitational force between them.

Gravity is a universal force that acts on all objects, regardless of their size or composition. It is responsible for keeping celestial bodies in orbit, such as planets around the Sun and moons around planets. On a smaller scale, gravity keeps us grounded on Earth and determines the weight of objects.

The force of gravity always acts toward the center of mass of an object. This is why objects tend to fall downward when released in the Earth's gravitational field. The force of gravity is continuously pulling objects toward the center of the Earth, giving rise to the sensation of weight.

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x max = (vi² sin 2α) / g

x max = (6.25² sin 90)/10

x max = 39.0625/10 = 3.91 m