9. An electron-positron pair has 12800eV of Ex. What photon frequency produced this?

Answer:

Spring cannot return to its original, since a part of its deformation is plastic, not elastic.

Explanation:

Physically speaking, stress is equal to the axial force divided by effective transversal area of spring. In addition, springs have usually a linear relationship between stress and strain in elastic region, since they are made of ductile materials. Axial force is directly proportional to axial stress, which is also directly proportional to axial strain.

Then, if force is greater than force associated with elastic limit of the spring, then spring cannot return to its original, since a part of its deformation is plastic, not elastic.

Answer:

12km per hour

Explanation:

The formula is distance/time.

24km/2 hours = 12km/1 hour

Explanation:

average speed = distance / time

= 24km/ 2 hr

= 12 km/ hr

Hope this will be helpful to you .

Yes, an electric field exerts a force on a stationary charged object. This is because the electric field is composed of electric lines of force that travel in a straight line and exert a force upon the stationary charged object.

The magnitude of the force depends on the strength of the electric field and the charge on the object. No, a magnetic field does not exert a force on a stationary charged object. This is because a magnetic field is composed of magnetic lines of force that travel in circles and therefore do not exert a force on a stationary object.

However, a magnetic field does exert a force on a moving charged object, such as a current-carrying wire. This force is known as the Lorentz force, which is a combination of both electric and magnetic forces.

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Answer:

Below

Explanation:

To calculate the time it took for the cyclist to finish their race, you can you this equation :

     time = displacement / velocity

Plug in your values....

     time = (100 mi) / (22 mi/h)

             = 4.54545454.... hours

As for sig figs in this question you would need to round this answer to 1 sig fig because 100 only has 1 sig fig. (you round to the lowest # of sig figs in the question)

     = 5 hours

It took the cyclist 5 hours to complete their race

Hope this helps! Best of luck <3

Answer:

The first case requires more force to spin de bucket.

Explanation:

As we know, the centripetal force is directly proportional to the mass, the equation is given by:

\(F_{c}=ma_{c}\)

The first case has a quarter more water than the second case, therefore the first case requires more force to spin de bucket.

I hope it helps you!

The net forces on the box acting perpendicular and parallel to the floor are

∑ F[perp] = F[normal] - 325 N + (475 N) sin(-35°) = 0

∑ F[perp] = (475 N) cos(-35°) - F[friction] = ma

where m is the mass of the box and a is its acceleration.

Solve for F[normal] :

F[normal] = 325 N + (475 N) sin(35°) ≈ 597 N

Then the frictional force has magnitude

F[friction] = 0.55 F[normal] ≈ 329 N

and so

60.5 N ≈ (325 N) a/g

(note that sin(-35°) = -sin(35°), cos(-35°) = cos(35°), and mg = 325 N so m = (325 N)/g)

Solve for a :

a = (60.5 N) / (325 N) g ≈ 1.82 m/s²

(a) Assuming this acceleration is constant, starting from rest, the box achieves a final velocity v such that

v² = 2a∆x

v² = 2 (1.82 m/s²) (5.80 m)

⇒   v ≈ 4.60 m/s

which happens in time t such that

v = at

4.60 m/s = (1.82 m/s²) t

⇒   t ≈ 0.177 s

(b) Let µ be the coefficient of static friction. The box just begins to slide if the magnitude of the parallel component of the applied force matches the magnitude of friction, i.e.

∑ F[para] = (475 N) cos(-35°) - F[friction] = 0

We have

F[friction] = µ F[normal] = (597 N) µ

so that

(597 N) µ = (475 N) cos(35°)

⇒   µ ≈ 0.651

Answer:

yes it's the right answer...............

Answer:

we need the graph to answer the question.

we can conclude that a stopping voltage of -6.26183 eV is not applicable in this case.

To predict the stopping voltage required to arrest the current of photoelectrons, we can use the equation:

stopping voltage = energy of incident photons - work function

1. First, let's convert the wavelength of the incident light from nanometers (nm) to meters (m). We have a wavelength of 150 nm, which is equivalent to 150 × 10^-9 meters.

2. Next, we need to calculate the energy of the incident photons using the equation:

energy = (Planck's constant × speed of light) / wavelength

Substituting the given values:

energy = (6.626 × 10^-34 J·s × 3 × 10^8 m/s) / (150 × 10^-9 m)

3. Calculate the energy of the incident photons.

energy = 0.08817 eV

4. Now, we can determine the stopping voltage using the formula:

stopping voltage = energy of incident photons - work function

Substituting the values:

stopping voltage = 0.08817 eV - 6.35 eV

5. Calculate the stopping voltage.

stopping voltage = -6.26183 eV

Since a negative voltage value doesn't make physical sense in this context, we can conclude that a stopping voltage of -6.26183 eV is not applicable in this case.

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5m I think,maybe, not a 100% sure die

Answer:

5m i think

Explanation:

WHATS THE ANSWER HELP!!

The current through a wire change if the wires resistance is increased in the following ways;

The relationship between resistance and the area of the cross section of a wire is inversely proportional. Resistance also depends on the material of the conductor.

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The work was done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\) and at an angle of \(29^o\) 42.83 J.

When an object is moved over a distance by an external force, at least some of that force must be applied in the direction of the displacement. This is known as work in physics. Work may be estimated if the force acting along the path is constant by multiplying the length of the path by the component of the force acting along the path.

To express this formally, the work W is equal to the force f times the length d, or W = fd. The work is W = fd cos if the force is applied at an angle to the displacement.

Given:

The mass, m = 2 kg,

The acceleration, g = 9.81 \(m/s^2\),

θ = angle between block and surface kinetic friction = μ

Calculate the work done by the formula given below,

\(W_{fy}\) = F sinθ

\(W_{fy}\) =  (\(mgsin\)θ)/ (sinθ -  μ * cosθ)

Substitute the values

\(W_{fy}\)  = \((2*9.81 sin29^{o} )/sin29^o - 0.30cos29^o\)

\(W_{fy}\)  = 42.83 J

Therefore, the work done by the force on the block of 2 kg with an acceleration gravity of  9.81 \(m/s^2\), and at an angle of \(29^o\) is 42.83 J.

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Answer:

14.826 kg

Explanation:

move the decimal at the end over to the left 3 times

Answer: 14.826

Answer:

150 km

Explanation:

It has a maximum speed of 150 km/h, and it sails at half its top speed, so it sails at 75 km/h. If it remains constant for 2 hours, it will have gone 150km.

The object must be placed at a distance of one-third (1/3) of the focal length from the mirror to create an upright image three times the height of the object.

The distance between the mirror and the object is determined by the magnification of the image formed. It is possible to determine the distance between the object and the mirror by using the formula for magnification.

Formula to calculate the distance between the object and the mirror:

Magnification = -Image distance / Object distance

Magnification, m = 3 (upright image)

Object distance, u = ?

Image distance, v = negative (-v)

Therefore, the formula for magnification can be rearranged as follows:

u = -v / m

To find the distance between the mirror and the object, substitute the given values into the formula. The solution is as follows:

u = -v / mu = -v / 3

Hence, if the magnification is 3, and the object is placed at a distance of 'u' from the mirror, then the image would be formed at a distance of 'v' = -3u (negative sign implies virtual image).

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Answer:

They are also called the gas planets because they consist mainly of hydrogen, or the giant planets because of their size. These planets usually have complicated system of many moons and often even rings of ice and/or dust. There are four Jovian planets in the Solar System: Jupiter, Saturn, Uranus and Neptune.

Answer:

They are also called the gas planets because they consist mainly of hydrogen, or the giant planets because of their size. These planets usually have complicated system of many moons and often even rings of ice and/or dust. There are four Jovian planets in the Solar System: Jupiter, Saturn, Uranus and Neptune.

Explanation:

i hope this helps :)

The slider that controls the height of the wave is typically labeled as "amplitude" or "height".

Adjusting this slider will either increase or decrease the height of the wave. If you want the height of the wave to decrease as it travels, you may need to use a more advanced tool or software that allows you to adjust the shape of the wave. This can be done by manipulating the wave's frequency, wavelength, and phase, among other properties.

amplitude, in physics, the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path.

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(a) It can be stated that the 10-gram marble hits the ground first because it has a higher acceleration and travels faster.

(b) Both marbles will travel the same distance since their horizontal components of velocity and initial velocity with respect to the ground are the same.

According to the given statement, a 10-gram marble has a speed that is 5 times faster than that of a 100-gram marble. Both marbles roll off the table at the same time. The questions to answer are as follows:

(a) The acceleration due to gravity is constant at 9.8 m/s², according to Newton's Law of Gravitation.

According to the law of physics, heavier objects fall faster than lighter ones, but since the 10-gram marble has a speed that is five times faster than the 100-gram marble, it implies that the 10-gram marble covers more ground in less time than the 100-gram marble as acceleration is directly proportional to the force applied.

The time taken by both marbles to reach the ground is given byt = √(2h/g)where h is the height from which the marbles were dropped, and g is the acceleration due to gravity.

The height from which the marbles were dropped is the same in both cases, so it can be stated that the 10-gram marble hits the ground first because it has a higher acceleration and travels faster.

(b) The range traveled by both marbles is determined by the horizontal component of their velocity. It's worth noting that the horizontal components of their velocities are identical since they were launched from the same height, so there's no advantage for either marble.

The range of a projectile is determined by the formula:

R = u²sin(2θ)/g where R is the range, u is the velocity of the object, θ is the angle of the initial velocity with the horizontal, and g is the acceleration due to gravity.

Since the angle of the initial velocity with the horizontal is the same for both marbles, and their initial velocity is also the same, it can be stated that both marbles travel the same distance.

Therefore, both marbles will travel the same distance since their horizontal components of velocity and initial velocity with respect to the ground are the same.

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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:

The velocity after 2 seconds can be found through:

V = u +a*t

Where V is final velocity, u is initial velocity, a is acceleration and t is time.

V = 0 + 2* 2= 4 meters/second

The distance (s) can be found through:

V^2= u^2 +2*a* s

Where V is final velocity, u is initial velocity, a is acceleration.

4^2= 0^2 + 2 *2*s

16= 0 + 4s

s= 4 meters

Distance (s) can also be found through:

s= ut + 1/2 at^2

s= 0+ 1/2 *2*2^2= 1 *2*2

s= 4 meters

Explanation:

The radius of curvature is observed to be equal to twice the focal length for spherical mirrors with small apertures. Hence R = 2f.

As the radius of curvature for a lens grow (R2 > R1), the curvature of the lens decreases, and the focal length of the lens expands (f2 > f1) We can say clearly that the main focus of a spherical mirror lies at the core between the center of curvature and the pole.

the radius of curvature becomes longer the circle gets larger. As the circle gets larger, its curve gets praised, as the curve gets admired on a clear material Focal length of a lens depends on the deform index of the glass from which it is built, and on the curvature of its two surfaces.

So we can conclude that the result of a radius of curvature on the focal length of a convex lens.

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Answer:

The new speed of the car is 30 m/s.

Hope you could get an idea from here.

Doubt clarification - use comment section.

5.83 N-E will be displacement when car travel 3km due north then 5km east.

the resultant displacement =\(\sqrt{3^2+5^2}\)

   = 5.83 N-E

Being a vector quantity, displacement has both a magnitude and a direction. The vector (or straight line) distance between an initial and final position is what is meant by this term. Knowing these two places is consequently all that is necessary to determine the resultant displacement.

Calculate the inverse tangent of the ratio of the displacement components in the y- and x-directions to determine the direction of the displacement vector.

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The reason a moving object slows down is that its force of motion gradually runs out  is false.

If no unbalanced force applies to an object, its momentum stays constant. According to Newton's Second Law, if an object is subjected to an unbalanced force, it will move with a constant speed.

What does momentum actually mean?

The product of a particle's mass and velocity is momentum. Momentum is a vector quantity that has both magnitude and direction. The force exerted on a particle is equated to the time rate of change of momentum by Isaac Newton's second equation of motion.

What does the word "momentum" mean?

illustration of momentum

whenever you throw a ball at a person and it hits him in the face. It shows how challenging it would have been to put a stop to the situation. In the air, a baseball is swooping. There is a big truck moving. a gun of this type shot a bullet.

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The frequency of the light source is 1.5 x 10¹⁵ Hz.

The frequency of the light source is determined using the following equations;

c = fλ

where;

c is speed of light

f is the frequency

λ is the wavelength

f = (3 x 10⁸) / (2 x 10⁻⁷)

f = 1.5 x 10¹⁵ Hz

Thus, the frequency of the light source is 1.5 x 10¹⁵ Hz.

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The neutron star that pulses 600 times per second must have had its angular momentum changed by a binary companion.

Neutron stars that pulse are known as pulsars and their pulses are caused by their rotation. The rate of pulsation is directly related to the neutron star's angular momentum. A pulsar that pulses faster must have a smaller radius and higher angular velocity than a pulsar that pulses slower.

Therefore, a pulsar that pulses 600 times per second must have a very small radius and high angular velocity, which can only be achieved by a change in its angular momentum. The most likely cause of this change in angular momentum is a binary companion transferring angular momentum to the pulsar.

In conclusion, a neutron star that pulses 600 times per second is the one that must have had its angular momentum changed by a binary companion.

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According to the data given in the question the net force on the box is of 5 N.

All of the forces that are applied to an object are added up to form the net force. As a consequence of the fact that it (force) is a vector and therefore that two forces with identical magnitudes and opposing directions cancel each other out, the resultant force is the total of the forces, or put another way, the net force is just the total of all the forces.

Given data :

Force on box to the left side (F1) = 15 N

Force on box to the right side (F2) = 20 N

Because both forces are in opposite direction

Hence,

Net force = F2 - F1

Net force = 20 - 15

Net force = 5 N.

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The distance L1 that the mother must place her second child of weight w on the right side of the pivot to balance the seesaw is (WL)/(W+w).


To balance the seesaw, the torques on both sides of the pivot must be equal. The torque due to the heavier child is W*L, and the torque due to the smaller child is w*L1. Therefore, to balance the seesaw, we need to have W*L = w*L1, which gives us L1 = (W*L)/(W+w).
For part B, the torque about the pivot due to the weight w of the smaller child is w*(Lend-L1), since the moment arm is the distance between the pivot and the child's position.
For part C, the sum of the torques on the seesaw is given by W*L - w*L1, since the torque due to the heavier child is positive and the torque due to the smaller child is negative.
For part D, the mother should position the child of weight W at a distance L from the pivot, where L = (w*L2 + w*L3)/(W+2w).
For part E, the mother should push with a force of Fx = (W+w)*g*h/(Lend - L1), where g is the acceleration due to gravity.

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